Rice a roni pilaf. It's very easy to make on the stovetop, only need a drop of oil/butter. I did it at my last RV potluck and it was completely gone (and I made more servings than people attending).
I also did a simple bean dish cooked on the stovetop (the recipe is at Bush Beans website). 1 lb Ground beef (I actually used veggie replacement crumbles and no one noticed), 1 can baked beans, 1 jar salsa, 2 potatoes chopped, 1 onion chopped. I chopped the potatoes at home and stored in water - fill to cover the potatoes. I skipped the onion. Try some of the fancy salsa - peach, etc. for a different flavor. This dish went well - only about one spoonful left.
Pasta is good, but I find it doesn't stay hot unless you can use a crock pot to serve it in.