Tomato and meat sauce was simmered too long, and needed to add water to have enough liquid for the very bottom of the pan before the first layer of dry pasta.
Started with only 2 zucchini, but it really does need 3 (one per layer). Use very little salt to sweat the zucchini. Rolled up in paper towels, then wring the water out
Didn't have enough ricotta, so ½ ricotta & ½ cottage cheese. It was OK in a pinch, but it made it too salty.
