Combine all ingredients except chicken together in a large bowl and stir to combine. Add chicken. Gently fold with rubber spatula until all ingredients are well incorporated. Cover and chill in fridge until ready to serve.
Serve with flour or corn tortillas, chips/crackers, or in a sandwich. Cilantro-Lime rice and Mexican riceare favorite sides. It's also delicious over a green salad, if you're looking to cut down on carbs. Keeps well when covered and chilled for several days.