Preheat oven to 350°F. Heat olive oil in a skillet over medium heat. Add ground beef and cook until browned, about 5 minutes.

Stir in the chopped onion and minced garlic. Cook until the onion is soft, about 3 minutes.

Incorporate the taco seasoning mix and tomato sauce. Stir thoroughly and cook for 2 minutes. Add the diced tomatoes and let simmer for 5 minutes. Finally, mix in the beans and corn.

Grease a 9x13-inch baking dish. Spread half of the crushed tortilla chips on the bottom. Top with half of the meat mixture and sprinkle with 1 cup of shredded cheese.

Layer with remaining chips, meat mixture, and cheese.

Cool taco bake for 5 minutes. Serve warm topped with lettuce, tomatoes, and sour cream if desired.