Preheat a non-stick skillet over medium heat.
Dice the chicken breast into bite-sized pieces and season lightly with salt and a pinch of smoked paprika for extra smoky flavor.
Cook the chicken pieces in the skillet until they are browned and cooked through, about 5-6 minutes. Remove and set aside.
In the same skillet, add diced red bell pepper and sauté until slightly softened, about 2 minutes.
Return the chicken to the skillet, add the black beans and drizzle BBQ sauce over the mixture. Stir well and let heat through for 1-2 minutes.
Place the whole wheat tortilla on a clean, heated surface or skillet. Sprinkle half of the low-fat cheese on one side of the tortilla.
Spread the chicken, black bean, and red bell pepper mixture evenly over the cheese, then sprinkle the rest of the cheese on top for extra melt.
Fold the tortilla in half and cook on the skillet over medium heat, pressing lightly, until the tortilla is toasted and the cheese melts, about 2-3 minutes per side.
Remove from heat, slice into wedges, and serve warm.