In a large baking dish, arrange the chicken breasts in a single layer.
Sprinkle the chili powder, cumin, smoked paprika, garlic powder, salt, and black pepper evenly over the chicken.
Add the sliced red and green bell peppers, along with the sliced onion, on top of the chicken. Toss them gently to coat with the spices.
Cover the baking dish tightly with aluminum foil and bake for 30 minutes.
After 30 minutes, remove the foil and bake for an additional 15 minutes or until the chicken is cooked through (165°F/75°C) and the vegetables are tender.
Remove the dish from the oven and sprinkle the shredded cheddar cheese over the top. Return it to the oven and bake uncovered for an additional 5 minutes, until the cheese is melted and bubbly.
Once done, let the dish cool for a few minutes before slicing the chicken into strips.
Serve the chicken and veggies with warm flour tortillas, a dollop of sour cream, and a sprinkle of fresh cilantro on top.
Notes
Serve with warm tortillas and sour cream for a complete meal.