Clean and wash vegetables. Cut the peppers into strips and the zucchini diagonally into slices. Peel the garlic and press it through the garlic press. Wash the basil, shake dry and cut into fine strips. Stone the olives. Cut the mozzarella into slices. Put the vegetables and olives in a greased baking dish, alternating with the cheese.
Mix the soybean oil, basil and garlic together. Distribute evenly over the vegetables.
Cook the vegetable casserole in the preheated oven at 200 ° / convection 180 ° for about 25 minutes.