Super Southwestern Beef Bake

2 Tbs. vegetable oil
1 1/2 lbs. ground beef (or turkey, or cubed, cooked chicken breast)
1 15-oz. can black beans, drained
1 9-oz. can whole kernal corn, drained
1 medium onion, chopped (optional)
8 oz. sour cream
1 cup mild salsa
3 cups crushed tortilla chips
8 oz shredded cheddar cheese
1 medium tomato, chopped (optional)

Heat oven to 425 degrees

1. In a large skillet, heat oil. Saute beef (meat) until fully browned; drain.
2. Place beef in a large mixing bowl and combine with beans, corn, chopped onion, sour cream and salsa. Stir until completely blended.
3. In a 9x13 dish, spoon enough beef mixture to cover the bottom. Arrange half the tortilla chip pieces on top of the meat mixture. Sprinkle cheese. Layer again with beef, chips then cheese. Top with chopped tomato.
4. Bake for 10 to 12 minutes, until cheese is fully melted. Enoy!