Meanwhile, put spaghetti in boiling water 4 and cook for the time indicated on the package. In the meantime, pour the yolks into a bowl 5, add most of the Pecorino cheese needed for the recipe and the remaining part will be used just before serving.

Season with black pepper 7 and whip by hand 8. Add a tablespoon of cooking water to dilute the mixture and stir 9.

In the meantime the guanciale will be cooked, turn off the burner and set it aside 10. Drain the pasta al dente directly into the pan with the guanciale 11 and stir it briefly to season it. Remove from heat and pour the mixture of eggs and pecorino cheese 12 into the pan. Mix quickly to combine.

To make it very creamy, if necessary, you can add a little cooking water to your pasta 13. Serve spaghetti carbonara immediately with the remaining pecorino cheese 14 and ground black pepper 15 on top.

PREPARATION

Ragù sauce: heat 3 table spoons of olive oil in a large saucepan on a medium heat. Add carrot, onion and celery peeled and finely chopped. Stir for around 15 minutes until the mixture is lightly colored.

Add the two types of meat, earlier minced, and stir breaking up meat with the spoon until the color is well brown. Pour the wine and mix until the alcool is evaporated. Add the tomato sauce, a glass of water, a generous pinch of salt and two bay leaves.

Turn the heat down and cook on low heat for at least 2 hours with lid. Stir occasionally. If the sauce start to dry out add a splash of water.

This sauce can be made in advance and kept in the fridge 2-3 days. If you want you can also chilled it.

Béchamel: melt butter in a pan over medium heat. Add flour and stir until the mixture becomes like a cream. Pour in very warm milk and whisk vigorously until you have a smooth white sauce. Bring the sauce to a boil, reduce heat and cook for at least 10 minutes.

Assembly: lasagne sheets can be used without precooking only if they are fresh. If you have the dry ones cook them in boiling water according to the instructions of the package (usually4-5 minutes).

Spread three spoon of ragù into the bottom of a earthenware ovenproof dish (25x35cm approx.). Follow with a layer of lasagne sheets, add a third of your ragù and a third of béchamel. Repeat the process (sheets, ragù and béchamel) two more time and top with grated parmesan. Preheat oven to 200°C. Bake the lasagne for 20 minutes until beginning to brown on top. Leave the dish 20 minutes before serving.