Bring a skillet sprayed with nonstick spray to medium-high heat on the stove. Add bell peppers, onion, and chiles and, stirring occasionally, cook until onion is mostly translucent, about 3 minutes.
Add chicken and cook and stir until hot, about 2 minutes.
Place lettuce in a bowl and top with black beans and chicken-veggie mixture. Sprinkle with cheese, and then top or serve with pico de gallo and sour cream. Enjoy!
PER SERVING (entire bowl): 264 calories, 2g fat, 714mg sodium, 22.5g carbs, 5g fiber, 7g sugars, 39g protein