Preheat oven to 350℉. Line a large baking sheet with parchment paper and spray lightly with cooking spray.
Lightly flour a large wooden cutting board. Roll out dough onto the floured surface.
Spread pizza sauce evenly over the dough, to the edges. Top with shredded mozzarella, pepperoni, onion, and bell pepper.
Roll pizza width-wise (the longest side) and sell the edges.
Slice into 1-inch pieces. Place the pizza pinwheels on the parchment covered baking sheet, about 2 inches apart.
With your hand, gently press down each pinwheel. This helps form the roll.
Bake for about 10 minutes, or until the tops are golden brown and the middles are cooked through.
Allow to cool for 2-3 minutes, sprinkle with your garnish of choice. We used chopped green onions.
For dipping, serve with pizza sauce, marinara, or ranch dressing.