For the vegetarian lasagna, first prepare the tomato sauce. For the tomato sauce, chop the onion and fry in oil.
Stir in tomato pieces and spices, simmer for about 15 minutes.
For the bechamel sauce, heat the butter, slowly stir in the flour and slowly pour in the warm milk. Bring to a boil, stirring constantly to prevent lumps from forming.
Add salt, pepper, nutmeg and simmer for 10-15 minutes. For the lasagna, butter a baking dish. Make a layer of lasagna sheets – tomato sauce – bechamel sauce – mozzarella. At the end, spread once more bechamel sauce and on top butter flakes, as well as some parmesan.
Bake the vegetarian lasagna at 180 °C top-bottom heat for 50 minutes.