We're vegetarian and I love old-school hippie casseroles, especially leftover. Here are a few favorites:

http://www.food.com/recipe/creamy-chickpea-and-tahini-casserole-56818

http://www.moosewoodcooks.com/2012/01/zucchini-feta-casserole/

http://www.food.com/recipe/scheherazade-casserole-36451

http://www.petesgreens.com/recipes/item/1802-spinach-rice-casserole/1802-spinach-rice-casserole

Chilequiles: http://www.foodnetwork.com/recipes/marcela-valladolid/chilaquiles-with-roasted-tomatillo-salsa-recipe.html

"Baked ziti": cook pasta to al dente (whatever kind, doesn't have to be ziti), chop up veggies (green peppers, zucchini, mushrooms, onion, garlic, whatever you like) and saute in olive oil, with Italian spices. Mix pasta, veggies, a can of diced tomatoes and a block of mozzarella cut up into cubes in a mixing bowl, pour in a casserole dish (best to spray with cooking spray to prevent sticking/burning). Sprinkle parmesan on top and bake until the cheese is melted.

This is technically a recipe for enchiladas, but easily modified to be a casserole:
http://www.myrecipes.com/recipe/black-bean-cheese-enchiladas

The real value in that recipe is the sauce. You can edit pretty much anything else to your liking. Personally I use full fat cheese and sour cream, flour tortillas, and add corn and red peppers to the filling. My carnivore family loves it.

I know, I know, I'm so déclassé, but for those of us who like casseroles, what are your favorite recipes? Vegetarian or easily vegetarianized preferred. I just found this link:

http://ohmyveggies.com/50-vegetarian-casserole-recipes/

Are there any other DCUMs here who are willing to anonymously express enjoyment of this kind of thing and share favorites?