Preheat oven to 350.
Mix chili and fritoes with 1 C cheese. Place in a baking dish. Top with remaining cheese. Bake for 30 - 45 min. Top with onion and jalapeno if you like.
A friend of mine likes to line the bottom of the baking dish with tamales and put the chili frito mix on top of it. If you like tamales I'm sure it's good, but I don't like em.