Taco Fiesta Bake Easy Weeknight taco bake casserole

Ingredients

• 1 pound (454g) ground beef (80/20 blend recommended)
• 1 tablespoon (15ml) olive oil
• 1 medium yellow onion, diced (approx. 1 cup) (approx. 150g)
• 1 packet (approx. 1 ounce/28g) taco seasoning mix (low-sodium preferred)
• 1/2 cup (120ml) water
• 1 (15 ounce/425g) can black beans, rinsed and drained
• 1 (15 ounce/425g) can corn, drained
• 1 (10 ounce/283g) can diced tomatoes and green chilies (like Rotel), undrained
• 8 ounces (227g) shredded cheddar cheese (or a Mexican blend)
• 8 ounces (227g) tortilla chips, lightly crushed (about half a standard bag)
• Optional: 1/4 cup (40g) sliced green onions, for garnish
• Optional: 1/4 cup (60g) sour cream, for garnish