Here's a favorite that I got from my mom, which she created and called "Italian Sausage Casserole". This recipe is written in my usual "just throw some stuff together" style. Sorry, I don't measure, I just cook.
Cook up Italian sausage (pork, turkey, or soy-based), a nice marinara, and some pasta (rotini works best, penne will do).
Mix 4-6 cups of shredded mozzerella, one container (pint???) of ricotta, one egg, one cup grated parmesan, and garlic and Italian herbs to taste.
Layer the ingredients in a casserole dish in the following order: sauce, pasta, sausage, cheese... until you fill the casserole or run out of stuff. The top layer should be cheese!!
Bake in the oven, um, until it's done.