Prep the Starter: Add starch to a pan over medium-low heat and warm it up. Once it is warm to the touch, slowly stir in the water, oil and salt. Mix over medium-low heat until it thickens into a translucent "glue."
Knead the Dough: Remove from heat and continue to mix it with your hands (be careful, it’s hot!). Knead for 10 minutes until it feels like smooth, elastic Play-Doh. Keep it covered with a damp towel or plastic wrap.
Marinate the Filling: Marinate the diced pork and shrimp with fish sauce, chicken bouillon, sugar, black pepper, garlic, shallots and the white part of scallions.
Sauté the Filling: Heat up neutral oil and add 1 tbsp of paprika. Add garlic and shallots and fry until fragrant. Stir-fry marinated pork and shrimp until fully cooked and the pan is dry.
Assemble: Flatten a walnut-sized ball of dough (thinning the edges). Add filling, fold into a half-moon, and pinch the edges tightly to seal.
Boil & Shock: Drop into boiling water and cook for 4-5 minutes. Once they float, cook for 1 extra minute. Immediately transfer to an ice bath for 2 minutes to set the "chew."
Finish: Drain and toss immediately in scallion oil to prevent sticking. Top with fried shallots.