Cut zucchini into slices and fry in oil. Cut the tomatoes into slices and layer them in a baking dish with the zucchini.
Whisk the sour cream with milk, season well with salt, pepper and the other spices. Pour over the tomatoes and zucchini. Sprinkle with cheese and bake at 180 ° C (top / bottom heat) for about 25 minutes until the cheese is golden brown.
To get a special note, 1-2 spring onions or a small onion can be stirred into the sour cream, as well as 1 clove of garlic.