Preheat grill to medium heat.
Layer two sheets of foil on top of each other. Place 1 chicken breast on top of layers. Season with salt and pepper.
Spoon 1/4 c. BBQ sauce on top of chicken. Top chicken with one fourth of each of the vegetables.
Bring opposite sides of foil up and over chicken and vegetables. Fold over to seal. Pinch other sides together to seal the packet. Repeat with remaining foil, chicken, and vegetables to make 4 packets.
Grill over medium heat 20 minutes or until chicken is done.