Add remaining oil to skillet. Add onions; cook 3 to 5 min. or until softened, stirring frequently and adding garlic for the last minute. Stir in wine; cook 3 min., stirring occasionally. Add pasta sauce and mussels; stir. Cover; simmer on low heat 3 to 5 min. or until mussels open. Remove and discard any unopened mussels.