Italian Sardinian Carasau Bread with Tomato, Pecorino and Egg | Pane Frattau
Pane frattau is the Sardinian answer to lasagna, built from pane carasau, tomato, pecorino and a poached egg in place of pasta, béchamel and ragù. Every sheet is dry, thin and unforgiving, so the plate succeeds or fails on how the tomato meets the bread.
This version drops the broth bath and lets the tomato sauce alone do the softening.
Yield: 4 servings. Prep: 20 minutes. Cook: 45 minutes. Total: about 1 hour 5 minutes. Difficulty: intermediate. Course: first course or light main. Region: Sardinia.
The Story
Pane carasau was invented for the road. In the pastoral interior of Sardinia, in Barbagia, the Nuorese and Ogliastra, shepherds followed their flocks for months and could not carry fresh bread that would mould in a week. The women of the villages baked a thin disc that puffed like a balloon in a wood oven, split it into two sheets while it was still hot, and returned the sheets to the oven until they were bone dry. The verb carasare, to toast, gave the bread its name. Stacked in a cloth sack, it kept for a season.
The dish called frattau grew out of that dryness. Sardinian frattare means to grate or rub, and the name points at the pecorino that goes between the layers. The oldest versions were nothing more than bread softened in hot mutton broth and covered with cheese, the food of a kitchen that wasted nothing: the broth came from boiling meat for another meal, the bread from the bottom of the sack, the cheese from the dry heel of a wheel. The egg appeared on Sundays and feast days, when a household kept hens and wanted a plate that could stand in for meat.
Tomato came late. It reached the island in serious quantity only in the nineteenth century, and when it did it changed the balance of the dish. Its acidity cut the salt of an aged pecorino, and its sweetness rounded the flat, toasted taste of the bread. In the towns around Nuoro and along the Campidano plain, cooks began to soften the sheets in a pan of tomato sauce rather than in plain broth, and that is the reading of the dish this recipe follows. The sauce is no longer a garnish. It is the moisture, the seasoning and the sweetness in one pot.
People compare it to lasagna, but pasta cooks inside a sauce, while carasau is already cooked and the cook controls only how much liquid reaches it, and how fast. That is why pane frattau is easy to describe and hard to cook well.
Today it is a fixture of trattorie in Cagliari, Nuoro and Oliena, where it arrives in a shallow dish, still steaming, with the yolk just beginning to move. The best versions taste of three things only: sweet tomato, sharp sheep's milk cheese and toasted wheat.
Ingredients
For the tomato sauce
Extra virgin olive oil, 3 tbsp (45 ml)
Yellow onion, small, finely chopped, 3 oz (85 g)
Garlic cloves, lightly crushed, 2
Whole peeled San Marzano tomatoes, 28 oz can (800 g), crushed by hand
Fine sea salt, 3/4 tsp (4 g)
Granulated sugar, 1/2 tsp (2 g), only if the tomatoes are sharp
Fresh basil leaves, 4
Tomato paste, 1 tbsp (15 g), for depth and body
Dried oregano, 1/4 tsp (0.3 g), optional
For the layers
Pane carasau, 6 large sheets, 7 oz (200 g)
Pecorino Sardo, semi aged, finely grated, 5 oz (140 g)
Warm water or light broth, 1/2 cup (120 ml), for loosening the sauce if needed
For the eggs
Very fresh large eggs, 4
Water, 6 cups (1.4 L)
White wine vinegar, 1 tbsp (15 ml)
Fine sea salt, 1/2 tsp (3 g), for the finished eggs
For finishing
Extra virgin olive oil, 2 tsp (10 ml)
Pecorino Sardo shavings, 1 oz (30 g)
Freshly cracked black pepper, to taste
Flaky sea salt, 1 small pinch
Small basil leaves, 4 to 6
Preparation
Cook the tomato down to the mark
Warm the olive oil, onion and garlic in a wide saucepan over low heat for 6 minutes until the onion is soft and the garlic smells sweet but has taken no colour, then remove the garlic and stir in the tomato paste for 1 minute. Add the crushed tomatoes, salt and basil and simmer gently, uncovered, for 30 to 35 minutes, stirring every few minutes. You want about 2 cups (480 ml) at the end, from roughly 3 1/2 cups. Taste, and add the sugar only if the tomato bites.
Test the density before you go on
Lift a spoonful and look at the back of the spoon. Draw a finger across it. The line should hold and close slowly over about 2 seconds. Too loose and the sauce runs off; too thick and it sits like paste. Adjust with a few more minutes of simmering or a splash of warm water, then keep the pan covered at a bare steaming point, around 160°F (70°C).
Warm the oven and the dishes
Set the oven to 200°F (95°C) and put four shallow bowls in to warm. A cold plate chills the sauce as it is spooned on and the sheets soften unevenly. Grate all the pecorino and divide it into three equal heaps per plate: one for each layer.
Break the carasau
Snap each sheet into four rough pieces, about 4 inches (10 cm) across. Do not soak, wet or brush them. They go in dry, and the sauce will do the work. Sort the pieces so the flattest ones are kept for the top layer, where they show.
Build the first layer
Set a piece of carasau in the warm bowl and spoon 3 tablespoons (45 ml) of the sauce over it, using the back of the spoon to spread it edge to edge. Scatter one third of the pecorino over the sauce. Repeat with a second sheet on top, spooning 2 tablespoons (30 ml) of sauce and one third of the cheese.
Close the stack
Lay a third sheet, spoon 1 tablespoon (15 ml) of sauce on it, add the last cheese and return the bowl to the oven for 3 minutes. This rest is what allows the sheets to relax without falling apart. Repeat with the other three bowls, keeping them in the oven while you work.
Poach the eggs
Bring the water and vinegar to a bare simmer in a wide pan, with tiny bubbles on the bottom and nothing rolling. Crack each egg into a cup and slide it in near the surface. Poach for 3 minutes until the white is set and the yolk is still liquid. Lift with a slotted spoon, drain on a cloth and season lightly with salt.
Finish and serve
Take a bowl from the oven, set an egg on the stack, and put 1 spoonful of sauce beside it, never over it. Scatter the shaved pecorino, a few drops of olive oil, black pepper and the basil. Serve at once, because the sheets keep softening in the heat and the texture is best in the first 5 minutes.
Plating
Use a wide, shallow bowl warmed to about 140°F (60°C), white or plain stoneware, so the dish looks like what it is: a stack of three sheets, red and gold, with a pale egg set on top and a ring of sauce around it.
The egg goes in the centre and the yolk should sit just proud of the white. Let a little grated cheese fall around the base of the stack rather than on the egg, and finish with two drops of oil and a crack of pepper. Keep the leaves whole and few. Bring a spoon and a fork to the table: the yolk is meant to be broken at the table, where it runs down through the layers and becomes part of the sauce.
Professional Technique
The whole dish is decided by the density of the tomato sauce. A sauce that is too loose floods the sheets. They turn to wet paper within a minute and the stack slumps into a soup. A sauce that is too thick sits on top of the carasau without moving into it, and the sheets stay hard and leathery, so the fork bounces.
The tomato has to be reduced to a precise point. Start from about 3 1/2 cups (830 ml) of crushed tomatoes and simmer, uncovered, until roughly 2 cups (480 ml) remain. Judge it with the back of a spoon: dip the spoon, lift it and run a finger across the tomato coating it. The channel should stay open and close slowly, in about 2 seconds. If it closes at once, simmer longer. If it never moves, add a spoon of warm water.
Then keep it warm, at around 160°F (70°C), covered. Cold sauce thickens, and a thickened sauce behaves like the too dense case even if it was perfect in the pan. Every plate takes a measured amount, spooned and spread, never poured from the pot and never added at the end over the whole stack. Pouring sends the liquid down the sides and leaves the middle dry.
The amount goes down as you climb: 3 tablespoons (45 ml) on the bottom sheet, 2 (30 ml) on the middle one and 1 (15 ml) on the top, so 6 tablespoons (90 ml) a plate. There is a reason. Liquid travels downward through the stack under its own weight and pools at the bottom, so the lower sheets receive extra moisture from the ones above. The top sheet is the one that meets the yolk, which adds its own liquid, so it needs the least. The ratio gives three equally tender sheets.
Texture and Moisture Control
Pane carasau is a dry, brittle starch. It has almost no water, so it absorbs liquid quickly and unevenly, first at the edges, then the centre. What softens it is heat and time, not just wetness: a warm sauce lets the starch relax over about 3 minutes in a low oven, while cold sauce leaves it stubborn. The 200°F (95°C) rest is a moisture control tool as much as a warming step.
The finished texture should be three distinct layers that keep their outline, tender but with a trace of bite at the edge, a little like fresh pasta cooked al dente. Waiting too long turns them soft all the way through, which is why the first 5 minutes at the table are the good ones.
The egg carries the creaminess. A properly poached yolk is fluid at about 145°F (63°C), thickening as it warms, so when it breaks it coats the top sheet and binds the cheese. Drain the egg on a cloth so that no poaching water reaches the stack, because even a teaspoon of water thins the sauce under it and loosens the top layer. Grate the pecorino fine so it melts into the sauce rather than sitting in flakes.
Professional Mise en Place
The service is short and the timing is tight, so nearly everything is done before the first sheet is touched.
Equipment and tools
Wide saucepan for the tomato and a lid that fits
Wide shallow pan and a slotted spoon for the eggs
Four shallow ovenproof bowls
Microplane or fine grater for the pecorino
Small cups for cracking the eggs, and a clean cloth for draining
Prepared ahead
Tomato sauce reduced to the mark, up to 2 days ahead, refrigerated and rewarmed gently
Pecorino grated and divided into three heaps per plate
Carasau sheets broken into pieces and kept dry in a covered box
Eggs cracked into cups, at room temperature, and the poaching water measured out
Basil leaves picked and kept under a damp cloth
Service setup
Sauce covered over the lowest heat at around 160°F (70°C)
Bowls warming in the 200°F (95°C) oven
Poaching water held below a simmer with the vinegar in it
Garnishes lined up: oil, pepper, basil and shavings
Spoons for the sauce laid out in three sizes, so the layers are measured by eye and never guessed
Chef Tips
Break the carasau by hand into pieces that fit the bowl. Cut edges come out neater than jagged ones, and the pieces should overlap slightly at the rim so no gap opens for the sauce to run through. Keep every sheet dry until it meets the sauce.
Make the tomato the day before if you can. It relaxes and sweetens overnight, and you can correct the density calmly when you rewarm it, instead of doing it under pressure while the eggs are waiting.
Choose a semi aged Pecorino Sardo rather than a very old one. Aged wheels are salty and hard, and they turn the sauce gritty. A young wheel melts and adds sweetness, which is what the dish wants next to sharp tomato.
If the sauce has become thicker while you build, stir in a tablespoon of warm water and taste again. Never loosen with cold water, and never add more cheese to compensate for dryness.
Common Mistakes
Pouring the sauce over the finished stack. The liquid runs down the sides and the middle sheets stay hard. Spoon a measured amount on each layer and spread it to the edges.
Skipping the reduction. A tomato sauce that leaves the pan at the consistency of soup floods the bowl and the stack slumps. Reduce until the spoon test holds for 2 seconds.
Reducing too far. A dense, jammy sauce cannot wet the carasau, and the sheets stay tough. If it has passed the mark, loosen it with warm water and bring it back.
Using the same amount on every layer. The bottom then drowns and the top stays dry. Use 3, 2 and 1 tablespoons, from the bottom up.
Soaking the sheets first. A pre soaked sheet has already taken all the water it can hold, so the sauce cannot flavour it and it collapses. Use dry sheets.
Overcooking the egg. A hard yolk removes the richness the dish depends on. Poach for 3 minutes and lift it while the centre still moves.
Wine Pairing
Vermentino di Gallura DOCG: The natural Sardinian partner. Its firm citrus acidity meets the tomato on equal terms, and the saline, faintly bitter finish echoes the pecorino instead of fighting it. A good bottle has enough body to stand up to the yolk without turning heavy, and it is served cold, which keeps the pecorino tasting clean.
Cannonau di Sardegna DOC: Choose a young, unoaked bottle and serve it lightly cool. Its soft tannin, red cherry fruit and dried herb notes run alongside the toasted carasau and the tomato, while the moderate structure keeps the egg and cheese from feeling rich. Its alcohol is warm but never hot, which suits the sweetness of the sauce.
Nuragus di Cagliari DOC: A light, high acid white from the plain around Cagliari with green apple fruit and low alcohol. It refreshes the palate between forkfuls of sheet, sauce and yolk and never adds another flavour to a plate that has only three. This is the bottle to pour when the pecorino is on the sharper side.
Cerasuolo d'Abruzzo DOC: A dry, deep coloured rosato with ripe cherry, a savoury edge and lively acidity. It matches the sweetness of the tomato and cuts through the fat of pecorino and egg yolk, a role a light red would fill only with more tannin than the dish can take.
Verdicchio di Matelica DOC: A dry, mineral white with high acidity and a bitter almond finish. The acid answers the tomato, the almond note picks up the toasted bread, and the firm body holds up against the yolk. It is the most structured white on this list and suits the richer versions of the dish.
Storage & Reheating
Never store the assembled dish. Carasau keeps absorbing until it is mush, and by the next day the stack is a solid paste. Store the components separately and assemble fresh.
The tomato sauce keeps refrigerated in a sealed container for up to 4 days and freezes well for up to 3 months. Rewarm it over low heat, stirring, and correct the density before use: it thickens in the fridge, so expect to add a splash of warm water. Pecorino, grated, keeps 3 days refrigerated in a closed container. Carasau keeps for weeks in a dry cupboard in an airtight bag. Poached eggs are best poached fresh. If you have to hold them, keep them in cold water for 24 hours and warm them for 30 seconds in hot, not simmering, water before serving.
Leftover assembled stack can be crisped in a hot oven, 375°F (190°C) for 12 minutes, as a baked snack, but it will never return to its first state.
Nutrition
Per serving, based on 4 servings:
Calories: 460 kcal
Total Fat: 25 g
Saturated Fat: 9 g
Trans Fat: 0 g
Unsaturated Fat: 14 g
Cholesterol: 205 mg
Sodium: 780 mg
Total Carbohydrates: 39 g
Fiber: 4 g
Total Sugars: 8 g
Added Sugars: 0 g
Protein: 22 g
Lactose: 0.5 g
Principal micronutrients: calcium, vitamin B12, selenium, lycopene, vitamin C, iron
These figures are estimates and vary with the cheese, the size of the eggs and how much oil goes into the sauce.
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