Whisk lime juice, oil, vinegar, cumin and salt in a small bowl. Stir in jalapeño. Place chicken in a shallow baking dish and pour the marinade over it, turning to coat both sides. Cover and refrigerate for at least 1 hour, turning once, or overnight.Advertisement
Preheat grill to high heat. Oil the grill rack (see Tip). Grill the chicken until cooked through and no longer pink in the middle, 3 to 4 minutes per side. Let cool slightly; thinly slice crosswise. Serve warm or chilled.
Make Ahead Tip: Marinate chicken in the refrigerator for up to 1 day and/or refrigerate cooked chicken for up to 1 day. Slice just before serving.
Tip: To oil a grill: Oil a folded paper towel, hold it with tongs and rub it over the rack. (Do not use cooking spray on a hot grill.) When grilling delicate foods like tofu and fish, it is helpful to spray the food with cooking spray.
2 lean meat