In a Baking dish and pour sauce on the bottom. Next layer the the pan with the lasagna sheets, add a layer sauce, sprinke the tofu ricotta on top of the sheets of lasagna, Add some spinach and slices of the zucchuni, add some sauce. Repeat, add layer of the lasagna sheets, ricotta, spinach and zucchini, sauce and then top with the lasagna sheet. Add some sauce. You can create as many layers as you want. Top the last layer of lasagna noodles with sauce and the rest of the ricotta.