Heat olive oil in a Dutch oven over medium heat. Add onion and bell pepper; cook 5 minutes, stirring frequently. Add garlic; cook 1 minute, stirring constantly. Stir in wine, crushed red pepper, and diced tomatoes; bring to a boil. Cover, reduce heat, and simmer 10 minutes. Add clams and next 6 ingredients (through scallops); cook 3 minutes or until shrimp are done. Serve seafood mixture over pasta, and sprinkle with cheese.