In a medium saucepan, heat oil; cook onion, green pepper, and garlic until tender. Add chopped tomatoes with liquid, tomato paste, and seasonings. Cover and simmer for 15 minutes, stirring occasionally. Add shrimp. cover and simmer for 3 to 5 minutes, until shrimp are tender.
Serve shrimp marinara with hot cooked pasta.
Calories per serving: 311