<human>:  What is the best way to make a vegetable lasagna?
<bot>: The best way to make a vegetable lasagna is to start by preheating your oven to 375°F (190°C). Then, spread a layer of tomato sauce in the bottom of an oven-safe baking dish. Add a layer of uncooked lasagna noodles to the dish and top with a layer of cooked vegetables such as spinach, mushrooms, bell peppers, and onions. Cover the vegetables with a layer of ricotta cheese and some Italian seasoning. Top the ricotta with another layer of lasagna noodles and repeat the steps of sauce, vegetables, ricotta and noodles until all the ingredients are used. Finally, top with a layer of shredded mozzarella cheese and bake for 45 minutes. Allow the lasagna to cool for 10 minutes before serving.