Vietnamese Style Chicken Dumpling Soup

Name: Vietnamese Style Chicken Dumpling Soup
Ingredients: 2 whole chickens; 1 teaspoon salt; 3 onions, quartered; 1 teaspoon black peppercorns; 1 (4-inch) piece ginger root, peeled and smashed; 1/4 cup fish sauce; Sugar; White pepper; 1/4 cup wood ear mushrooms; 1/4 cup chopped cabbage; 1/2 pound shrimp, ground; 3/4 pound chicken, ground; 2 scallions, minced; 1 tablespoon minced ginger; 1 shallot, minced; 1 tablespoon vegetable oil; 1/4 cup peeled and chopped jicama; 2 cloves garlic, mashed; 1/2 cup cilantro, minced; 1 1/2 tablespoons fish sauce; 1/2 teaspoon black pepper; 1 package dumpling wrappers; Baby ginger, julienne; Cilantro, chopped; Scallions, julienne