Gluten Free Cowboy Casserole My Easy Weeknight Chuckwagon

Ingredients

• 1 tablespoon olive oil (15 ml)
• 1 pound ground beef (450g)
• 1 medium yellow onion, chopped (approx. 1 cup; 150g)
• 1 green bell pepper, chopped (approx. 1 cup; 150g)
• 1 teaspoon chili powder (5ml)
• 1/2 teaspoon garlic powder (2.5ml)
• 1/2 teaspoon onion powder (2.5ml)
• 1/4 teaspoon cumin (1.25ml)
• Salt and pepper to taste
• 1 (14.5 ounce) can diced tomatoes, undrained (411g)
• 1 (15 ounce) can whole kernel corn, drained (425g)
• 1 (10.75 ounce) can condensed cream of mushroom soup (gluten-free variety, check labels!) (305g)
• 1/2 cup sour cream or plain Greek yogurt (120ml)
• 4 cups gluten-free corn tortilla chips, crushed (about 170g, use chips made without wheat starch or cross contamination in factory)
• 2 cups shredded cheddar cheese (225g)