Preparation Cook garlic and red pepper flakes (if using) in oil in a 6- to 8-quart heavy pot over moderately low heat, stirring, until garlic is pale golden, 1 to 2 minutes. Add wine and boil over high heat 2 minutes. Add tomato sauce and mussels and cook over moderately high heat, covered, stirring occasionally, until mussels just open wide, 6 to 8 minutes. (Discard any mussels that are unopened after 8 minutes.) Serve immediately.
Preparation Cook garlic and red pepper flakes (if using) in oil in a 6- to 8-quart heavy pot over moderately low heat, stirring, until garlic is pale golden, 1 to 2 minutes. Add wine and boil over high heat 2 minutes. Add tomato sauce and mussels and cook over moderately high heat, covered, stirring occasionally, until mussels just open wide, 6 to 8 minutes. (Discard any mussels that are unopened after 8 minutes.) Serve immediately.