1. Preheat oven to broil. Purée red peppers and sun-dried tomatoes and their oil in food processor 1 to 2 minutes, or until smooth.
2. Place pita rounds on baking sheet. Spread 1/4 cup red pepper sauce on cut side of each pita. Sprinkle with oregano, then top with mozzarella and garnish with sliced red peppers, if desired. Broil 3 to 5 minutes, or until cheese is melted and bubbly. Scatter basil leaves over pizzas, and serve immediately.