Nacho Casserole

1 pound ground beef (optional)
1 onion, chopped finely
1 15 oz can corn
1 16 oz can chili beans
1 15 oz can tomato sauce
1 package taco seasoning (or 1/2 pkg, depending on your tastes)
3 cups shredded cheddar cheese, divided
3 cups slightly crushed tortilla chips
toppings: sour cream, diced tomatoes, green onions

Preheat over to 350 degrees.  Lightly grease a 9x13 baking dish.
Saute the onion until golden and brown and drain the ground beef (if using).
Add the corn, chili beans, tomato sauce, and taco seasoning and stir until combined.  Cook over medium heat for about 5 minutes until all the ingredients have warmed through.
Spoon half the meat/bean mixture into the baking dish and top with half the crushed chips and half the shredded cheese.
Pour the remaining half of the meat/bean mixture on top and add the remaining chips and then cheese.
Cover with aluminum foil and bake for 20-25 minutes or until hot and bubbly, taking off the foil for the last 5-10 minutes.
Drizzle with sour cream and top with diced tomatoes and green onions.
Makes 10 servings.