In medium fry pan saute chicken breast, sprinkle wtih garlic powder, salt, pepper and taco seasoning. Mix through thoroughly, add peppers, onion, saute till tender, and chicken is no longer pink. Butter outside of sliced sub buns sprinkle with basil if desired, place in toaster oven for 3 minutes to melt butter, and crisp bun. Remove bun, and put chicken mixture in bun. Top each sandwich with grated cheese. Place back in toaster oven open until cheese bubbles and begins browning. Serve with cucumber spears. Source; kitchen of Marina cheesman