Bologna-style green lasagne layered at least six times with ragù, light béchamel and Parmigiano Reggiano, then baked until cohesive and browned.
Lasagne verdi alla bolognese is defined by architecture as much as flavour. Thin green pasta sheets form multiple distinct layers, while ragù provides depth, béchamel supplies moisture and Parmigiano binds the whole structure. The finished slice should stand without becoming dry or brick-like.
Bologna Welcome records a recipe decreed by the Bologna San Luca delegation of the Accademia Italiana della Cucina in 2003 and deposited with the Bologna Chamber of Commerce. It specifies one kilogram of classic Bolognese ragù, 400 g Parmigiano Reggiano, béchamel and roughly one kilogram of green pasta sheet for eight people.
The green pasta is not ordinary lasagne tinted for appearance. Boiled, well-squeezed spinach is worked into a flour-and-egg dough, bringing both colour and vegetal flavour. The sheets are briefly blanched, cooled and dried on cloth before assembly.
The ragù follows the updated Bologna formula: pancetta, beef, finely cut onion, carrot and celery, a restrained amount of tomato, dry wine, milk and broth as needed. The two-hour simmer creates concentration without turning the sauce into a heavy tomato stew.
Official layering guidance calls for at least six strata. Béchamel should be creamy but thinly spread, ragù should be generous rather than flooding, and air pockets should be avoided. A short rest after baking is enough for the layers to settle before cutting.
Melt the finely chopped pancetta in a heavy pan over medium-low heat. Add the olive oil, onion, carrot and celery and cook gently until softened without deep browning, about 8–10 minutes.
Add the coarsely minced beef and increase the heat. Stir until the meat loses its raw colour and begins to sizzle rather than steam.
The pan should sound dry and lively before the wine is added.
Pour in the wine and let it evaporate completely. Add the tomato, cover partially and simmer very gently for about 2 hours, adding small amounts of broth only when the pan becomes too dry.
Near the end of cooking, stir in the milk and simmer until integrated. Season with salt and pepper. Measure out about 1 kg ragù for the lasagne.
Mix the flour, eggs and very dry chopped spinach into a firm dough. Knead until smooth, cover and rest for 30 minutes.
Roll the dough very thin and cut into rectangles around 15 × 10 cm, or slightly smaller than the baking dish if working with large sheets.
Boil the sheets briefly in salted water until they rise, transfer immediately to cold water, then spread flat on clean cloths to dry.
The sheets should be supple and cooked on the surface, not waterlogged.
Melt 100 g butter, whisk in 100 g flour and cook for about 2 minutes without browning. Gradually whisk in the milk and simmer until smooth and lightly thickened, 8–10 minutes. Season with salt and nutmeg.
The sauce should coat a spoon but still spread in a thin veil.
Heat the oven to 180 °C. Butter the baking dish and spread a few spoonfuls of ragù and béchamel over the base.
Add pasta, a thin veil of béchamel, a generous but even layer of ragù, a little butter and Parmigiano. Repeat until at least six pasta layers are formed, avoiding trapped air.
Cover with a final pasta sheet, a little ragù mixed with béchamel, Parmigiano and a few butter pieces, including small pieces in the corners.
Bake at 180 °C for 25–30 minutes until bubbling and browned on top. Rest for 5–10 minutes before cutting.
A cut square should hold distinct layers without leaking watery sauce.
Ragù can be made a day ahead and refrigerated. Warm it until spreadable before assembly so cold dense sauce does not tear the fresh pasta.
Squeeze cooked spinach aggressively before chopping it. Excess water makes the dough sticky and weak, forcing in too much flour.
The béchamel should be lighter than a gratin sauce. If it stands in thick ridges, whisk in a little hot milk before layering.
Assembled unbaked lasagne can be frozen well wrapped. Thaw overnight in the refrigerator before baking, allowing extra time for the centre to heat.
Estimate based on the full deposited-style green pasta, ragù, béchamel and Parmigiano quantities divided among eight servings.
Contains wheat/gluten, egg and milk; contains pork and beef.
Cook the ragù thoroughly and cool any make-ahead batch rapidly before refrigeration.
Refrigerate cooked lasagne within 2 hours. Reheat leftovers until piping hot throughout.
The deposited Bologna formula incorporates boiled, well-squeezed spinach into fresh egg pasta.
The Bologna Welcome deposited recipe specifies at least six overall layers.
They can make a good baked pasta, but the deposited green-lasagne identity is based on fresh spinach pasta sheets.
No. The updated Bologna formula uses a restrained amount of tomato relative to meat, with milk added near the end.
