Peruvian-Style Grilled Chicken With Green Sauce

Recipe by J. Kenji López-Alt Ingredients # For the Sauce: # 3 whole jalapeño chiles, roughly chopped (see notes) 1 tablespoon (15 ml) ají amarillo pepper paste (see notes) 1 cup fresh cilantro leaves (1 ounce; 28 g) 2 medium cloves garlic 1/2 cup (120 ml) mayonnaise 1/4 cup (60 ml) sour cream 2 teaspoons (10 ml) fresh juice from 1 lime 1 teaspoon (5 ml) distilled white vinegar 2 tablespoons (30…