In a casserole dish, add a layer of tomato sauce to the bottom of the pan and spread evenly. Next, add a layer of ready lasagna noodles (you may need to break the noodles to make them fit into the dish). Then, add a layer of tofu ricotta and spread evenly over noodles. Now, add a layer of spinach and mushrooms on top of the ricotta (if there are other vegetables that you want to add here, feel free. Zucchini, black olives, artichokes...) Then, add another layer of tomato sauce, noodles, ricotta, veggies, sauce... I like to have 3 full layers. The final layer should be sauce and then I sprinkle with a vegan Parmesan cheese which is just a combination of cashews, nutritional yeast, onion powder and garlic powder.