Cut onion in brunoise (small cubes) for the sauce and for the meat.
Sauce:Sauté the onion with olive oil and a pinch of salt. When it is golden add the blended tomato.
Add salt and a teaspoon of sugar and cook and let reduce until the desired consistency is achieved.
Beef filling:Sauté the onion with olive oil and a pinch of salt for 2 minutes. Add the minced beef.
Add salt and pepper.
Add a splash of white wine (Sauvignon blanc).
Add a pinch of salt, sugar a bay leaf and mix well.
Add a clove of minced garlic.
When the meat is barely cooked add one or two tablespoons of tomato paste and cook over medium heat until all the liquid almost evaporates and the meat is left with a little thick sauce.
Dough:Mix the flour and eggs until you get a uniform dough. On the table sprinkle flour so that the dough does not stick and knead stretching the dough (with the help of a little more flour) as thin as possible. Remember that when boiling it swells a little.
Cut the dough to the size of the cooking tray to use or a few centimeters larger because after it can be cut again to tidy up.
Set up:Put a base of tomato sauce on the bottom of the dish so that the first layer of dough does not stick. Add a layer of dough.
On each layer add a layer of sauce, a layer of meat and the grated cheese.And so build as many layers as the height of the tray leaving about 2 or 3 cm of space for the finish. On the last layer add a base of bechamel sauce (See video recipe at https://everythingtotaste.com/bechamel-sauce), a layer of sauce and mozzarella cheese.
Finish with finely grated Parmesan cheese so that when cooked it gratins.
As all the ingredients are previously cooked, the cooking time in the oven will be short.
Cook them in the oven at 180°C for about 10 minutes or until the cheese is gratin. If you do it in an electric oven, you can move up the source so that it gratins faster as it is closer to the heat.
Enjoy!