Tonggs Chinese Dumpling recipe Gau Gee

Name: Tongg's Chinese Dumpling recipe (Gau Gee)
Ingredients: 1⁄4 lb shrimp, minced; 1⁄4 lb ground pork; 8 water chestnuts, minced; 1⁄4 cup green onion, chopped fine; 1 teaspoon salt; 1 teaspoon ginger juice (I've used fresh grated ginger); 2 teaspoons soy sauce; 1⁄2 teaspoon five-spice powder; 30 wonton wrappers; 1 dash pepper; sweet and sour sauce; 1 tablespoon cornstarch; 1⁄2 cup sugar; 1⁄4 cup vinegar; 1 tablespoon ketchup; 6 tablespoons water