Step 1

Whisk all the sauce ingredients together until smooth and creamy.

Step 2

Heat a grill or skillet over medium high heat. Coat the chicken with the chili powder and a generous sprinkling of salt and pepper. When the grill is hot, add a little bit of butter if necessary to prevent sticking, and add the chicken. Cook for a few minutes on each side until the chicken is cooked through. I like to let it get it really golden brown on the outside. Set aside and let cool for at least five minutes. Cut or shred into small pieces.

Step 3

In a mixing bowl, combine about half of the sauce with the chicken and the grapes. Add more sauce as needed to get everything evenly coated.

Step 4

Stuff each butter lettuce leaf with the mixture. Add water or oil to the remaining sauce until it pours evenly off the end of a spoon – use it to drizzle over the top. Squeeze with lime juice when serving if you’re that kind of person.