In large skillet, brown ground beef over medium heat 6 minutes.
Add bell pepper and onion. Continue cooking 3-4 minutes or until beef is no longer pink and vegetables are crisp-tender. Season with 3/4-tsp. salt and 1/2-tsp. pepper.
Place bread shell on baking sheet. Remove beef and vegetables from skillet with slotted spoon and arrange on top of bread shell.
Sprinkle cheese on top of beef and vegetable mixture.
Bake 8-10 minutes or until cheese is melted. Cut into 8 wedges and serve hot
