Cook from frozen. Water Immersion: In a saucepan, bring 6 cups of water to a boil. Reduce heat to low and submerge pouch in simmering water for 5-6 minutes. Shake bag to coat mussels with sauce before serving. Sauce Pan: Empty contents of pouch into a sauce pan. Cover & heat over medium heat for approximately 4 minutes, reduce heat and simmer for additional 2 minutes.