Grilled Red Snapper and Mango with Cilantro-Lime Vinaigrette

Name: Grilled Red Snapper and Mango with Cilantro-Lime Vinaigrette
Yield: 4 Servings
Ingredients: 6 tablespoons olive oil; 5 tablespoons chopped fresh cilantro; 3 tablespoons fresh lime juice; 1 1/2 teaspoons grated lime peel; 4 5- to 6-ounce red snapper fillets; 1 large mango, peeled, cut into thick wedges; 3/4 teaspoon cumin seeds; 8 large red-leaf lettuce leaves