Makes 12 lettuce cups

1/2 cup mayonnaise
2 teaspoons chile-garlic sauce
1 teaspoon Dijon mustard
1/2 teaspoon Asian sesame oil
2 pounds leftover chicken, skin and bones discarded, meat pulled into bite-size pieces
1/3 cup water chestnuts, coarsely chopped
2 scallions, white and green parts thinly sliced
Kosher salt and freshly ground pepper
12 Bibb or iceberg lettuce leaves
1 Hass avocado, peeled and cut into 12 slices
Lime wedges, for serving

In a medium bowl, mix the mayonnaise with the chili garlic sauce, mustard and sesame oil. Stir in the chicken, water chestnuts and scallions and season with salt and pepper. Spoon the chicken salad into the lettuce cups and top with a slice of avocado. Serve with lime wedges.