Step 3: Pile couscous in the center of 4 plates. Place 1 salmon fillet on top of each pile of couscous. Drizzle 1 ounce sauce around couscous and slightly over edges of fish. Garnish with finely chopped parsley.
Step 1: In a large saucepan, combine 1 cup white vinegar, 1 cup lemon juice, 1 1/2 cups white wine, 3 tablespoons chopped shallots, 2 tablespoons sugar and 1 cup finely diced canned tomatoes. Cook over medium heat, stirring frequently, until reduced by half.
Step 2: Add 2 cups heavy cream; reduce by half again. Slowly add 1 pound butter over low heat.
Step 3: In separate pan, simmer 1 cup red wine until it reduces to 1/4 cup. Add reduced red wine to the sauce and stir to combine.