In a large bowl, combine the ground chicken, spring onions, shiitake mushrooms, garlic, ginger, soy sauce, rice vinegar, sesame oil, sugar, black pepper, and optional MSG. Mix well until the filling looks smooth and slightly sticky.
In a 7x9-inch deep heatproof dish, spread one-third of the meat mixture over the bottom.
Lay 9 dumpling wrappers over the filling with minimal overlap.
Add another layer of the meat mixture, then another layer of dumpling wrappers.
Repeat with the last layer of meat filling and finish with the final layer of dumpling wrappers.
Gently pour 75 ml water over the layered Viral Dumpling Lasagna.
Place the dish in a steaming basket set over a pan with 2 to 3 inches of water. Cover with a lid and steam over high heat for 17 minutes.
While it steams, make the sauce by stirring together tahini, sugar, soy sauce, lime juice, sesame oil, and minced garlic until smooth.
Carefully remove the dish from the steamer once the dumpling wrappers look wrinkled and tender.
Drizzle the sauce over the top, then finish with chilli oil, chives, and sesame seeds before serving.