Defrost the spinach. Peel garlic and onion. Peel or clean and wash the carrots, peppers, tomatoes and eggplant. Dice everything except 3 tomatoes
Heat the oil. Fry garlic, onion and vegetable cubes well. Steam spinach. Season everything with stock and pepper
Heat butter. Sweat flour in it. Deglaze with milk and 1/4 l water. Bring to the boil and simmer for about 5 minutes. Season to taste with salt, pepper and nutmeg
First spread some sauce in a greased casserole dish. Layer pasta plates, vegetables and the rest of the sauce. Cut the rest of the tomatoes into slices. Spread on the lasagne with cheese. Bake in a preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for approx. 45 minutes until golden brown