Taco Casserole

I got this recipe out of the free cookbooks they hand out at Costco around the holidays. It's so easy and really yummy! I've made it as an appetizer, as well as for dinner. We may actually have it tonight...

1-1/2 lbs. lean ground beef or turkey (I use ground turkey breast)
1/4 c. taco seasoning
1 can (15 oz.) pinto beans, drained and rinsed
1 can (15 oz.) tomato sauce
1 can (11 oz.) whole kernel corn, drained (I thaw frozen corn)
1 c. shredded Cheddar cheese
1 c. coarsely crushed tortilla chips

Optional assorted toppings: sour cream, sliced green onions, shredded lettuce, chopped tomato, avocado, guacamole...

-Preheat oven to 400 degrees.
-Brown meat in a large skillet over medium-high heat. Drain off the fat.
-Stir in seasoning mix, beans, tomato sauce, and corn. Bring to a boil. Reduce heat to low and simmer for 5 minutes.
-Spoon the mixture into a 2-qt. baking dish. Sprinkle with cheese and tortilla chips.
-Bake for 5-10 minutes, or until the cheese is melted.
-Serve with assorted toppings, if desired.