Preheat your oven to 375 degrees Fahrenheit. Spray a 9 by 13 inch baking dish with cooking spray and set aside.
In a large skillet over medium heat the olive oil.
1 tablespoon olive oil
Add the onion and green bell pepper and cook until softened, about four minutes.
1 yellow onion, 1 green bell pepper
Add in the ground beef and cook until no longer pink. Drain any excess grease from the pan and then stir in the taco seasoning.
1 pound ground beef, 3 tablespoons taco seasoning
To the prepared baking dish add the beef and vegetables, pinto beans, salsa, diced tomatoes, and diced chiles. Mix to combine and then spread to an even layer. Top with Fritos. Cover with cheese.
15.5 ounces pinto beans, 1 cup salsa, 14.5 ounces diced tomatoes, 4 ounces green chiles, 2 cups cheddar cheese, 3 cups corn chips
Bake for 10 minutes or until the cheese is bubbly. Top with tomatoes, lettuce, and sour cream.