Spray a large muffin tin (6 to a pan – a small one won’t cut it) with cooking spray and then spoon in some sauce to coat the bottom generously. Add a layer of noodles, a little sauce, a little ricotta mixture, a layer of eggplant, some mozzarella, a little sauce, more noodles. Repeat the next layer with the mushrooms and build it as high as you can go. I can only fit two layers. On the top layer of noodles top with sauce and cheese.