Italian Potato Focaccia with Zucchini and Confit Cherry Tomatoes | Focaccia di Patate con Zucchine e Pomodorini Confit
Potato focaccia carries potato twice. A little riced potato goes into the dough for a tender, moist crumb, and a full layer of paper thin slices covers the top, where the edges turn crisp and golden over a soft centre. Confit cherry tomatoes and zucchini ribbons add summer sweetness.
Cut it into squares and serve it warm.
Yield: 12 squares. Prep: 45 minutes. Rise: 14 hours including the cold rest. Bake: 30 minutes. Difficulty: intermediate. Course: bread, appetizer or side dish. Region: Puglia and Liguria traditions.
The Story
Potato in bread dough is a nineteenth century solution that outlived the problem it was invented for. The potato reached Europe from the Americas in the sixteenth century as a botanical curiosity, and it took generations before it entered ordinary Italian kitchens. When it did, it was cheap where wheat was expensive, and bakers discovered that a little boiled potato stretched the flour, kept the crumb soft for days and made a dough that forgave rough handling. A loaf that stayed fresh until the end of the week mattered enormously in households that baked once.
The habit took root in several places at once, and each region bent it toward its own bread. In Puglia, around Bari, boiled potato went into the deep pan focaccia baked in wood ovens and topped with tomatoes, olives and oregano, and the woman who could produce a tall, glossy, tender focaccia was respected in her street. Families still carry their trays to the neighbourhood bakery on Sundays to be baked in the communal oven. In Liguria, the land of thin, oiled, dimpled focaccia, potato appeared in doughs meant to stay supple under a salty brine. Both traditions agree on one point: potato is an ingredient of texture before it is an ingredient of flavour.
Potato on top of the bread is a shorter, more domestic history. Bakers laid thin slices over a tray of dough because the slices needed no other preparation, they browned in the same oven, and the starch and olive oil together produced something between bread and roast potato. Zucchini and cherry tomatoes belong to the same summer logic: the kitchen garden emptied onto a sheet of dough because that is what was ripe. Confit, the slow bath of tomatoes in warm olive oil, is the one deliberate refinement here. It turns a watery, acidic tomato into a concentrated sweet jewel that will not soak the crumb.
Southern Italy gave the deep, olive oil fried base, Liguria gave the salted, dimpled surface and the habit of eating focaccia at any hour, from breakfast dipped in milky coffee to a late afternoon snack wrapped in paper. The market gardeners around Bari and Genoa gave the vegetables. This tray is the sum of those habits, made with a baker's discipline rather than a nostalgic one, and it tastes as good cold at a picnic as it does hot from the oven at the table.
Ingredients
For the dough
Italian type 0 flour, 4 1/4 cups (500 g)
Cooked and riced Yukon Gold potato, 5.3 oz (150 g), weighed after cooking
Cool water, 1 1/3 cups (330 ml)
Extra virgin olive oil, 3 tbsp (40 ml)
Fine sea salt, 2 tsp (12 g)
Instant yeast, 1 tsp (3 g)
Barley malt or honey, 1 tsp (7 g)
Water for boiling the potato, 4 cups (950 ml), salted with 1 tsp (6 g) fine sea salt
For the potato topping
Yukon Gold potatoes, raw and unpeeled, 10 oz (285 g)
Cold water, for soaking, 4 cups (950 ml)
Extra virgin olive oil, 2 tbsp (30 ml)
Rosemary leaves, chopped, 1 tsp
Freshly ground black pepper, to taste
Extra virgin olive oil for the dough bowl, 1 tsp (5 ml)
For the confit tomatoes and zucchini
Cherry tomatoes, 12 oz (350 g)
Extra virgin olive oil for the confit, 1/4 cup (60 ml)
Garlic cloves, lightly crushed, 2
Thyme sprigs, 3
Zucchini, small and firm, 7 oz (200 g)
Extra virgin olive oil for the zucchini, 1 tbsp (15 ml)
Fine sea salt for the tomatoes, 1/2 tsp (3 g)
For the pan and finishing
Extra virgin olive oil for the pan, 3 tbsp (45 ml)
Flaky sea salt, a generous pinch
Fresh thyme leaves, from the confit sprigs
Preparation
Step 1: Confit the tomatoes
Heat the oven to 250°F (120°C). Halve the cherry tomatoes and lay them cut side up in a small tray, tight in a single layer. Tuck in the garlic and thyme, season with the 1/2 tsp of salt and pour the 1/4 cup of oil over them. Bake for 75 minutes until they are collapsed at the edges but still hold their shape. Cool in the oil. Lift them out with a slotted spoon when needed and keep the perfumed oil for another use.
Step 2: Cook and rice the potato for the dough
Boil one whole unpeeled potato in salted water for about 30 minutes, until a knife slides in without resistance. Peel it while it is still too hot to hold comfortably and pass it through a ricer straight away. Riced hot, the starch stays fluffy and disappears into the dough. Weigh out 5.3 oz (150 g) and cool it to room temperature.
Step 3: Mix and rest the dough
In a large bowl stir the flour, yeast and malt together, add the water and the riced potato and mix until no dry flour remains. Rest for 20 minutes, then add the salt and the 3 tbsp of oil and squeeze the dough through your fingers until it is smooth and elastic, about 5 minutes. The dough will be soft and slightly sticky, which is correct. Move it to a bowl rubbed with the 1 tsp of oil and cover it.
Step 4: Fold and refrigerate
After 45 minutes at room temperature, do a set of stretch and folds, lifting each side of the dough and folding it over the centre. Repeat once more after another 45 minutes. Cover tightly and refrigerate for 12 hours. The slow cold rest develops flavour, and it makes the dough easy to handle in the pan.
Step 5: Shape in the pan
Pour the 3 tbsp of pan oil into a 13 by 18 inch (33 by 46 cm) rimmed sheet pan. Tip the cold dough out, fold it once and lay it in the pan. Stretch it gently toward the corners. If it springs back, rest it for 15 minutes and try again. Cover and let it proof at room temperature for about 90 minutes until puffy and jiggly.
Step 6: Slice and prepare the toppings
Heat the oven to 450°F (230°C). Slice the raw potatoes with a mandoline as thin as you can manage, then drop them into the cold water for 10 minutes. Drain and dry them thoroughly on kitchen towels. Toss them with the 2 tbsp of oil, the rosemary and pepper, but no salt. Shave the zucchini into ribbons and toss with the tablespoon of oil.
Step 7: Dimple and top
Oil your fingertips and press deep dimples across the dough, all the way to the pan. Overlap the potato slices like roof tiles in rows over the whole surface, leaving a small margin at the rim. Press them lightly so they grip the dough.
Step 8: Bake in two stages
Bake on the lowest rack for 18 minutes, until the potato edges start to colour. Quickly scatter the zucchini ribbons and the confit tomatoes over the top and bake 10 to 12 minutes more, until the potatoes are golden with darker crisp edges and the base is deep gold when you lift a corner. Slide the focaccia onto a rack right away so the bottom does not steam.
Step 9: Finish and cut
Season with the flaky salt and fresh thyme leaves while the focaccia is still hot, then rest it for 10 minutes. Cut into 12 squares with a sharp knife or a pizza wheel and serve warm.
Plating
Serve on a wooden board or a wide platter lined with parchment, cut into generous squares, warm but no longer hot, so the potato crust keeps its snap. Stack the squares slightly offset so the tiled edges show. Scatter a few whole confit tomatoes and a little thyme over the board and add a small dish of the confit oil for dipping.
As an appetizer, cut smaller rectangles and pair them with burrata or fresh ricotta. As a side, cut larger squares to sit beside grilled fish or roast lamb. Do not drizzle extra oil over the top, since it softens the crisp potatoes. Keep the plates at room temperature, because a hot plate continues to cook the underside of the base and softens the crust.
Professional Technique
The technical problem here is timing. The potatoes on the surface must be cooked at exactly the moment the dough is done, and the two cook at very different speeds. A thick slice is still raw and waxy when the bread is finished, and a bread left in the oven for the potato becomes dry and over baked underneath. The solution is to slice the potato transparent, thin enough to read through with a mandoline, so it cooks in the same 25 to 30 minutes the dough needs.
The slices then spend 10 minutes in cold water. This removes the starch released on the surface by the blade, which would glue the slices into a paste and stop the edges from crisping. Dry them thoroughly, because water on the surface steams the slices instead of browning them. Then toss them in olive oil before they touch the dough. The oil is what fries the edges in the oven, and a slice coated in advance browns evenly while a slice oiled afterward stays pale in patches.
Overlap the slices only slightly, like roof tiles. Each slice shelters the one behind it so the centres stay soft and moist, while the exposed edges turn glassy and crisp.
The potatoes are not blanched first, because a boiled slice is fragile, absorbs water and turns to mash on the dough, and it browns poorly. Raw slices lose their surface moisture to the oven and crisp properly. For the same reason the salt goes on at the end of the bake. Salt applied earlier pulls water out of the slices, which then steam, wrinkle and stick together. Flaky salt on the hot, dry surface dissolves lightly and stays crunchy.
Texture and Moisture Control
Each component has a different water problem. The dough is high hydration, which gives an open crumb, and the riced potato holds moisture through the bake so the interior stays soft for a day. The pan oil fries the underside and gives the base its crisp golden bottom. If the pan is thin or the oven too cool, that bottom turns pale and soft.
Cherry tomatoes are mostly water, so they go through the confit first. Slow cooking in oil evaporates that water and concentrates the sugars, and the oil coating keeps what remains from bleeding into the dough. Raw tomatoes in a focaccia leave wet, grey patches in the crumb. Zucchini is also watery, so the ribbons go on for the last part of the bake only, when they need just enough time to soften and blister at the edges.
Leave the focaccia in the pan for no more than a minute after baking. Steam trapped between the bread and the metal softens the bottom crust in minutes. Cool it on a rack so air reaches all sides. Cutting the squares before it is fully rested releases too much steam and the crumb turns gummy, so rest it for 10 minutes first.
Professional Mise en Place
The work is spread over two days and the finish is quick. Put the components in the order below and the bake takes care of itself, leaving you free to prepare the board while it runs.
Equipment and tools
13 by 18 inch (33 by 46 cm) rimmed sheet pan, preferably dark metal
Mandoline with a guard, a ricer and a large mixing bowl
Digital scale, a bench scraper and a wire rack
Slotted spoon for the confit tomatoes, clean towels for drying the potato and a sharp chef knife or pizza wheel
Prepared ahead
Confit tomatoes, up to 4 days ahead, refrigerated in their oil
Dough mixed and refrigerated the day before
Zucchini shaved and refrigerated in the morning, and potatoes sliced only 1 hour before baking
Potato for the dough cooked, riced and cooled the night before the mixing
Service setup
Oven fully preheated for 30 minutes with the rack at the bottom
Potatoes dried, oiled and lined up next to the pan
Flaky salt, thyme and a sharp knife ready for the moment the tray comes out
Chef Tips
Weigh the potato after cooking, not before. Boiled potato holds water and the weight differs from the raw weight, and the dough hydration depends on it.
Choose a waxy or all purpose potato such as Yukon Gold. Floury potatoes shed starch and fall apart on the dough, and the slices lose their outline.
Bake on the lowest rack. Heat from the bottom fries the base in its oil while the top browns, so the bread and the potato finish together.
Keep the confit oil. Brushed lightly on the rim right out of the oven, it adds a faint tomato and thyme perfume that is worth more than any extra seasoning.
Rotate the pan halfway through the first stage. Most home ovens are hotter at the back, and a half turn makes the browning even across all 12 squares.
Common Mistakes
Slicing the potatoes thick. A slice thicker than the width of two coins is still hard when the bread is done. Use a mandoline and slice as thin as it allows.
Skipping the cold water soak. Surface starch glues the slices together and blocks browning. Rinse them, then dry them well.
Boiling the topping potatoes first. Blanched slices break, absorb water and turn to paste, so they never crisp. Use them raw.
Salting the potatoes before baking. Early salt draws out water, and the slices steam and wrinkle. Salt after the bake.
Adding raw tomatoes. Uncooked cherry tomatoes flood the crumb with juice. Confit them first and add them late.
Under proofing the dough. A tight, cold dough bakes into a dense, bready slab, so wait until it is puffy and jiggles when the pan is shaken.
Baking on a high rack. The top browns and the potato scorches while the base stays pale and soft. Use the lowest rack and the full 450°F (230°C).
Wine Pairing
Riviera Ligure di Ponente Pigato DOC: The natural partner for an oiled Ligurian style focaccia. Its herbal, saline profile echoes the thyme and rosemary, and its crisp acidity cuts through the olive oil on the crust. The mid weight body holds up to the sweetness of the confit tomatoes without covering the potato.
Vermentino di Gallura DOCG: A dry white with citrus, sea breeze salinity and a slightly bitter almond finish. The bitterness sits well against the zucchini and the toasted edge of the potato, and the freshness resets the palate after a rich, oily square. It is the wine to pour when the focaccia is served alongside grilled vegetables.
Cinque Terre DOC: Light, mineral and saline, made from terraced vineyards over the Ligurian sea. Its low alcohol and lively acidity keep the pairing light, so it suits the focaccia as an appetizer, and its delicate floral notes lift the thyme.
Trento DOC: A dry metodo classico with fine bubbles and brisk acidity. The carbonation scrubs olive oil from the tongue after each bite, and the toasty, yeasty notes mirror the baked crust. A very good choice when the focaccia is passed with the aperitivo.
Cerasuolo d'Abruzzo DOC: A dry, deeply coloured rosato with red cherry fruit and gentle tannin. It matches the roasted sweetness of the tomatoes and stands up to the dense potato, and it is the pick for anyone who wants a red fruited wine without heavy tannin.
Storage & Reheating
Focaccia is best within 6 hours of baking. Keep leftover squares at room temperature, loosely covered with a clean towel, for the same day. Plastic wrap traps moisture and the crisp potato topping turns leathery. Refrigerate for up to 3 days in an airtight container, though the crumb stiffens in the cold.
To freeze, cut into squares, wrap each one and freeze for up to 2 months. Reheat straight from frozen or refrigerated on a rack in a 400°F (200°C) oven for 8 to 10 minutes, until the edges crisp again. Never use a microwave, because it softens the topping and toughens the crumb. Refresh the surface with a few flakes of salt and a little thyme.
Nutrition
Per serving, based on 12 squares:
Calories: 265 kcal
Total Fat: 9 g
Saturated Fat: 1.4 g
Trans Fat: 0 g
Unsaturated Fat: 7.3 g
Cholesterol: 0 mg
Sodium: 480 mg
Total Carbohydrates: 39 g
Fiber: 3 g
Total Sugars: 2 g
Added Sugars: 0.5 g
Protein: 6 g
Lactose: 0 g
Principal micronutrients: potassium, vitamin C, vitamin B6, folate, iron, lycopene
These figures are estimates.
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