Grind the tomatoes with a blender. Chop the onion and garlic. Grate the cheese.
In a skillet, fry the onion and garlic until golden brown. Add minced meat, stir, fry for another 5-7 minutes. Add tomatoes, oregano and basil to the minced meat. Stir and simmer over low heat for 15 minutes.
Cooking Bechamel sauce. Melt butter in a frying pan, add flour and stir thoroughly. Stir in the milk gradually. Cook for 7-8 minutes. Then turn off the heat, add the grated cheese and stir.
Cover the dish with baking paper. Place a layer of béchamel sauce, lasagna sheets on top of the sauce, then tomato and meat sauce. Next, alternate layers: pasta-bechamel-meat sauce-pasta. Brush the top with béchamel sauce and sprinkle with parmesan. We put in a preheated oven for 40-45 minutes. Temperature 180 degrees.