Slice avocado in half, remove the pit and scoop out flesh into a small mixing bowl. Mash avocado with a fork until it’s smooth.
Squeeze some of your lemon or lime juice into the bowl and mix to combine with avocado. (This will add flavor and help prevent avocado from browning prematurely).
Sprinkle salt, pepper and garlic powder to taste into the avocado mixture. Mix well.
Stir in the remainder of the ingredients (minus the lettuce). Combine until chicken, tomatoes, carrots, onion, and pepper are evenly coated with avocado.
Scoop mixture into lettuce leaves, wrap loosely and enjoy.