Peel the carrots and onions and dice them finely. Peel and chop the garlic. Cut the meat into small cubes of about 1 cm. Heat the oil in a high frying pan. Fry the meat in it while turning.
Finally add onions, carrots and garlic and fry briefly. Season with salt, pepper and ##oregano##. Stir in tomato paste, sweat it and deglaze with ##wine## and beef stock.
Bring to the boil, cover and stew for about 1 hour. Stir in between. Clean, wash and pat dry the zucchini. Cut the zucchini lengthwise into slices about 1/2 cm thick (e.g. with a slicing machine).
For the béchamel sauce, melt the fat in a pot and sauté 40 g of flour in it. Add the vegetable stock and milk while stirring, bring to the boil and simmer for about 5 minutes. Stir 50 g cheese into the sauce, melt in it and season with salt, pepper and nutmeg.
Mix 1 tbsp. flour and approx. 3 tbsp. cold water. Stir the flour into the finished ragout and simmer for another 4-5 minutes. Season to taste with salt and pepper. Put a thin layer of béchamel sauce on the bottom of an oven dish and cover with 3 ##Lasagne## plates.
Spread half the ragout on top and cover with half of the zucchini slices. Place another layer of béchamel sauce, lasagne sheets, ragout and the remaining zucchini slices on top and cover with the remaining béchamel sauce.
Sprinkle with 75 g cheese and ##pine nuts##n. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 45 minutes. Garnish finished lasagne with fresh marjoram as desired.