Easy Sausage Pizza

1 pre-baked Italian bread shell crust (12 inches)
1 c pizza sauce
1 ¼ c (5 oz) shredded mozzarella cheese, divided
½ lb ground Italian sausage, pinched into dime-sized pieces
½c chopped green pepper
optional:
onions, mushrooms, olives, or any other type of desired toppings
pepperjack cheese in place of mozzarella

Preheat oven according to crust package directions. Spread sauce over crust; sprinkle w 1 c cheese. Sprinkle with sausage and green pepper. Top with the remaining cheese. Bake according to crust package directions or until sausage is no longer pink and cheese is melted.