Dice chicken breast into bite size ½ inch pieces.
In a large shallow pot or large skillet, melt butter over medium heat.
Add chicken, bell pepper and onions to pot or skillet. Sprinkle chicken with cumin, Cajun seasoning, pepper and crushed red pepper flakes. Stir.
Cook chicken until no longer pink and onions are translucent. Add garlic and cook for an additional minute.
Add remaining ingredients to pot, stir, cover, reduce heat and cook until rice is tender, about 20-25 minutes.
Remove from heat, serve in individual bowls and top with optional toppings, as desired.