Walnut Prawns Crispy Yam Ring

Name: Walnut Prawns Crispy Yam Ring
Ingredients: 300 gram Yam; 60 gram Wheat Starch; 90 milliliter Water; 60 gram Vegetable Shortening; 1/2 teaspoon Baking Powder; 1 teaspoon Salt; 1 teaspoon Granulated Sugar; 1/4 teaspoon Ground White Pepper; 1/4 teaspoon Chinese Five Spice Powder; 1 teaspoon Sesame Oil; 35 gram Vermicelli Noodles; as needed Frying Oil; 1 Red Chili Pepper; 1/2 Green Bell Pepper; 8 Prawns; 40 gram Walnut; 120 gram Pineapple; 1 tablespoon Cooking Oil; 2 tablespoon Tomato Sauce; 1 tablespoon Chili Sauce; 1 tablespoon Granulated Sugar; 1 tablespoon Light Soy Sauce; 1 teaspoon Rice Vinegar; 4 tablespoon Water; 1 teaspoon Corn Starch