Bring a large pot of water to a boil. When the water is almost boiling, take 3 pieces of the dough from the refrigerator.
Press the dough flat on a work surface and take one end of the piece in each hand and pull. Slap the dough on the table until it becomes elongated into a wide noodle. Rip this noodle down the middle, creating a longer, continuous, circular noodle and throw it into the boiling water. Repeat with the rest of the pieces.
Boil the noodles until cooked through, and then drain and transfer to a bowl.
Top with the lamb, and add more soy sauce, chili oil and black vinegar to taste.