Steam the onion cubes in 2 tablespoons of olive oil until translucent, add the minced meat and mushroom leaves and cook for about 5 minutes. Fold in the cut tomatoes, pour fresh cream or milk over them, season with salt, pepper, and season with vegetable stock and oregano.
Rub the baking dish with half a clove of garlic, grease with a little butter and cover with a layer of pasta sheets. Now put 1/3 of the minced meat sauce in the baking dish, sprinkle with 1/3 of the cheese, cover with another layer of pasta platters. Then layer in the same way: 1/3 of the sauce, 1/3 of the cheese, pasta layer, remaining sauce, remaining cheese.