For an extra layer of flavor, consider adding a splash of white wine to the skillet along with the chicken stock. If you prefer a thicker sauce, remove the chicken after cooking and whisk a cornstarch slurry (1 tablespoon cornstarch mixed with 2 tablespoons cold water) into the pan juices. Simmer until thickened. To ensure even cooking, use chicken thighs of similar size. Leftovers can be stored in an airtight container in the refrigerator for up to 3 days. Reheat gently in a skillet or microwave.