4 first-course servings
Source: Bon Appétit December 2005
Heat 2 tbsp oil in heavy large pot over medium-high heat. Add onion and sauté until tender, about 4 minutes. Add mussels, 2 tbsp parsley, anchovies, and garlic, then liqueur; stir to blend. Boil 1 minute. Add tomato sauce and wine. Cover and cook until mussels open, about 6 minutes (discard any mussels that do not open). Season sauce to taste with salt and pepper.
Divide mussels and sauce among 4 shallow bowls. Drizzle mussels with remaining 2 tbsp oil and sprinkle with remaining 2 tbsp parsley.