Set oven to 400F.
Cook rice according to instructions and set aside to cool.
Season chicken breast with smoked paprika, cumin and dried oregano.
Set a deep (nonstick) skillet on medium heat, and once hot, add olive oil, garlic, onion and bell pepper. Cook for about 2 to 3 minutes until the outside of the onion has slightly browned.
Add chicken breast and sear and cook for about 3 to 5 minutes.
Fold in the cooked brown rice, then stir in the black beans, tomato, enchilada sauce and water. Mix everything together and bring to a light simmer. Reduce the heat to low-medium, then cover and cook for 8 to 10 minutes.
Remove the top, stir up the chicken and rice and season to taste with sea salt & pepper. Sprinkle on some cheese (if desired), then bake for 5 to 7 minutes to melt the cheese.
Garnish with fresh cilantro and avocado, then enjoy!