This beautifully hued salad features fresh tomato, avocado, and mango, the peach of the tropics. Look for fairly large mangoeswhich have a higher fruit-to-seed ratio than smaller onesand buy only those that are yellow with a blush of red.
In a medium bowl combine mango, tomato, and red onion. For dressing, in a screw-top jar combine cilantro, oil, vinegar, lemon juice, garlic, salt, and pepper. Cover and shake well. Pour dressing over mango mixture. Toss gently to coat. Cover and chill for at least 1 hour or up to 4 hours.
Just before serving, stir in avocado. If desired, serve with lettuce leaves.