Gratin is any sweet or unsweetened dish, baked to form a delicious crust. I suggest you cook the gratin in a slow cooker. The vegetables in the cooking process to fall apart, and filled with aromas of each other.
Mix with bread crumbs, garlic butter and wine. Stir.
Half of potatoes cut into semicircles. At the bottom of the bowl pour a little oil and put the potatoes. Sprinkle it with 1/3 of the cheese mixture. Add salt.
Then lay out onion and tomatoes. And also sprinkle 1/3 of the cheese mixture. Add salt.
Put the thinly sliced zucchini, put the remains of the cheese mixture and the top, last layer of potatoes again.
Cook in "Baking" mode for 40 minutes. Not mix.
Our baked, fragrant vegetables are ready! The bottom has formed a Golden brown. To apply with the spatula, turning the browned side up. You can use this dish as a garnish. But it is delicious and as an independent dish-vegetables perfectly kept their shape, but became very tender and soft!