6 bone-in, skinless chicken pieces (about 4 pounds)  | 
                                                2 cups minced yellow onion  | 
                                                1 cup finely diced celery  | 
                                                1 cup finely diced carrots  | 
                                                1 dried bay leaf  | 
                                                4 quarts chicken stock, low-sodium chicken broth, or water  | 
                                                2 cups finely diced chayote or butternut squash  | 
                                                2 cups peeled sweet potato, diced  | 
                                                2 medium ears corn, cut into 1/2-inch rounds, or 1 cup fresh corn kernels  | 
                                                1/2 cup loosely packed fresh dill sprigs  | 
                                                1 serrano pepper, thinly sliced  | 
                                                1/4 cup chopped fresh cilantro  | 
                                                salt and freshly ground black pepper to taste  | 
                                                2 limes, cut into wedges  |