In a bowl, combine all of the ingredients. Season with salt and pepper. Set aside.
Burgers
Toast the hamburger buns. Cover the inside of the buns with the sauce. Top the bun bottoms with the chicken, pickles and lettuce. Close with the bun tops.
Note
To reheat the chicken, preheat the oven to 425°F (220°C). Place the chicken pieces on a baking sheet lined with a silicone mat or parchment paper and reheat in the oven for 10 minutes or until crispy.