Preheat the oven to 400F
Coarsely chop the pepper
Coarsely chop the onion
Spray the pizza pan with cooking spray
Unroll the dough onto the pan
Spread the spaghetti sauce over the dough
Sprinkle the cheese over the sauce
Sprinkle the pepper and onion over the cheese
Spread the pepperoni slices over the cheese
Sprinkle garlic powder, onion powder, and oregano over the pepperoni
Bake 10-12 minutes in the preheated oven
Remove from the oven and allow to stand 5 minutes
Cut the pizza
Serve