Clean and wash the zucchini and mushrooms, dab dry and cut into thin slices. Peel onion and garlic. Chop the onion finely, press the garlic through a garlic press. Wash thyme, dab dry and chop, except for a little bit for garnishing. Heat the oil in a frying pan and fry the onion and garlic briefly. Add zucchini, mushrooms, 2 tablespoons of water, strained tomatoes and thyme. Season with salt, pepper and paprika and simmer for about 5 minutes.
Stir in cottage cheese and season again with salt and pepper. Stir cream cheese and milk until smooth. In a greased casserole dish, alternate layers of cream cheese sauce, lasagne sheets and tomato and vegetable sauce. Finish with tomato-vegetable sauce. Cut the Gouda into strips and place them on the lasagne in a grid pattern. Bake in the preheated oven (electric: 200 °C/ gas: level 3) for 30-40 minutes. Pluck the remaining thyme from the stems and sprinkle on the finished lasagne as desired