4 (about 1 pound total) fresh poblano chiles 4 garli if they’re larger i cut them in halves or quarters), peeled if you wish 2 10-inch piece banana leaf, (optional; divided use) 8 chicken thighs boneless, skinless (about 2 pounds total) or bone-in, skin-on (about 3 1/2 pounds total) 1/2 cup chopped cilantro