For baked lasagnas, start with a thin layer of sauce, then noodles, the cheese mixture, more sauce, and repeat. Cover the top layer with mozzarella cheese. u003cbr/u003eu003cbr/u003eFor skillet lasagna, make wells in the sauce on the bottom, fill the wells with spoons of ricotta cheese, then lay noodles on top and cover with a little sauce and mozzarella cheese slices.