Halal-style Chicken with White Sauce

Halal Gyro and Chicken is an extremely popular cart at 53rd Street and Avenue of the Americas. There’s always a huge line down the sidewalk waiting for their moist, tender grilled chicken with tangy white sauce. This is merely my approximation and not their recipe, but it’s an homage to a NYC institution.

White sauce:
1/2     cup mayonnaise
1/4     cup red wine vinegar
2    tablespoons lemon juice
1/2     teaspoon black pepper
1/2     teaspoon paprika
1/4     teaspoon salt
1/8     teaspoon cayenne

Chicken:
1     teaspoon salt
1     teaspoon chili powder
1     teaspoon garlic powder
1     teaspoon paprika
6     boneless, skinless chicken breasts

1.  Combine the white sauce ingredients in a small bowl and set aside. Combine the salt and spices for the chicken and rub all over the chicken breasts.
2.  Preheat a gas grill for 10 minutes on high with the lid down, or prepare a medium-hot charcoal fire.
3.  Place the chicken breasts over direct heat and grill for about 10 minutes, moving them around the grill to prevent flare-ups and scorching.
4.  Remove the chicken to a serving platter and cut into thin slices. Drizzle generously with the white sauce and serve immediately.