Add mango and crabmeat; toss gently to coat. Arrange 1 lettuce leaf on each muffin half, and top each with 3/4 cup crab mixture. Sprinkle with almonds.
Per serving: 361 Calories; 15g Fat (37% calories from fat); 24g Protein; 34g Carbohydrate; 66mg Cholesterol; 652mg Sodium