Chicken and Slick Dumplings Recipe

Name: Chicken and Slick Dumplings Recipe
Ingredients: 1 whole small chicken, about 3 pounds; 2 medium onions, ends trimmed and quartered; 1 small head garlic, ends trimmed; 1 teaspoon whole peppercorns; 1 bunch parsley, stems reserved, leaves chopped, divided; Kosher salt and freshly ground black pepper; 1 cup (5 ounces) all-purpose flour; 2 tablespoons (1 ounce) unsalted butter, softened; 1 tablespoon vegetable shortening; 1 teaspoon baking powder; 1/4 cup whole milk; 1/2 teaspoon lemon juice from one lemon; pinch nutmeg (optional)