No need to choose between pizza and pasta tonight!
In ovenproof skillet, cook sausage over medium-high, breaking meat up with spoon, until browned, 5 minutes. Add onion, bell pepper, and garlic; cook, stirring often, until tender, 5 minutes. Add sauce and chopped pepperoni; simmer until flavors meld, about 5 minutes. Stir in pasta. Sprinkle with cheese. Top with pepperoni slices. Broil until crisp, about 3 minutes. Top with basil.