In 12-inch skillet, heat Olive Oil over medium-high heat and cook onion 4 minutes or until softened. Add scallops and shrimp and cook, turning once, 3 minutes or until shrimp almost turn pink and scallops are almost opaque. Stir in wine and cook 1 minute. Stir in Sauce and bring to a boil over high heat. Reduce heat to low; stir in mussels and red pepper flakes. Simmer covered 5 minutes or until mussel shells open. (Discard any unopened shells.) Serve over hot linguine.