Arrabbiata is Italian for "angry"....the crushed red pepper in this recipe. to save time, substitute bottled minced garlic instead of the 3 cloves of garlic. Also feel free to substitute fettuccine or spaghetti instead of linguine!
Cook pasta according to the package directions, omitting salt and fat; drain.
While pasta cooks, heat 1 tbsp oil in a large nonstick skillet over medium-high heat. Add the scallops and shrimp to the pan; cook 3 minutes. Remove from the pan; keep warm
Heat remaining 1 tbsp oil in the pan over medium high heat. Add onion, red pepper, and garlic; cook 2 minutes. Add tomato paste and tomatoes. Bring to a boil and cook 2 minutes. Add clam juice, cook 1 minute.
Add clams; cover, reduce heat to medium and cook 4 minutes. Add mussels; cover and cook 3 minutes or until clams and mussels are open. Discard any unopened shells.
Stir in scallops and shrimp. Add parsley; cook 1 minute or until thoroughly heated.