Step 1Puree the mango, oil, vinegar, lime juice, fish sauce, chili garlic sauce and soy sauce in a blender. Set the dressing aside for its flavors to develop while you make the salad.
Step 2Place the shrimp, lettuce, lime zest, snap peas, avocado, onions and tomatoes in a large serving bowl. Tear the basil and mint leaves and add to the salad. Taste the dressing and adjust the seasonings to taste. You'll have about 1 cup of dressing. Gently toss the salad with enough dressing to coat well. Reserve the extra dressing for another use. Serve with the lime wedges.