To create your amazing Southwestern Baked Chicken, follow these simple steps:

1. Preheat the Oven: Begin by preheating your oven to 375°F (190°C).
2. Season the Chicken: In a small bowl, mix the chili powder, cumin, paprika, garlic powder, onion powder, salt, and black pepper. Rub this spice blend evenly over the chicken breasts.
3. Prepare the Baking Dish: Lightly grease a baking dish with cooking spray or olive oil.
4. Arrange the Chicken: Place the seasoned chicken breasts in the prepared baking dish.
5. Add Vegetables: Distribute the corn, black beans, and diced tomatoes evenly around and over the chicken.
6. Top with Cheese: Sprinkle the shredded cheddar cheese generously over the chicken and vegetables.
7. Bake: Place the dish in the preheated oven and bake for 40-45 minutes, or until the chicken is cooked through and reaches an internal temperature of 165°F (75°C).
8. Rest: Once cooked, remove the dish from the oven and let it rest for 10-15 minutes.
9. Garnish: Before serving, drizzle the lime juice over the chicken and sprinkle with freshly chopped cilantro for added flavor.
10. Serve: Cut the chicken into portions and serve hot, along with the accompanying vegetables.

By following these steps, you’ll create an incredible dish that showcases the wonderful flavors of the Southwestern region while ensuring simplicity in preparation.