Easily upgrade your chicken with this tasty sauce. Also great with it: fish tacos or beef skewers.
Preheat the oven to 400°.
In a blender, pulse the cilantro, lettuce, mayonnaise, mint, sour cream, coarsely chopped scallions, lime zest and juice, chile, and garlic until smooth, about 2 minutes. Season the sauce with salt and pepper.
Place the chicken pieces on a rimmed baking sheet; season. Rub 1/2 cup of the sauce all over the chicken.
Roast the chicken until an instant-read thermometer registers 165° when inserted into the thickest part of the breasts and thighs and the juices run clear when the meat is pierced with a knife, 35 to 45 minutes.
Serve the chicken with rice and the remaining green sauce. Garnish the rice with the chopped scallion greens.