Grilled Mahi Mahi with Lime-Ginger Vinaigrette

Name: Grilled Mahi Mahi with Lime-Ginger Vinaigrette
Yield: 4 Servings
Ingredients: 1/2 cup canola or vegetable oil; 1/2 cup chopped fresh lemongrass (from bottom 4 inches of 2 stalks); 3 tablespoons chopped peeled fresh ginger; 2 tablespoons fresh lime juice; 2 teaspoons grated lime peel; 4 7- to 8-ounce mahi mahi fillets (each about 3/4 inch thick)