Delicate steamed rice sheets envelop seasoned pork in a smooth, slippery roll topped with soy sauce. A beloved dim sum family staple, this dish is protein-rich and satisfyingly light.
Mix rice flour, tapioca starch, and water thoroughly in a bowl until a smooth batter forms. Let it rest for 10 minutes to hydrate the starches.
Finely slice pork loin and toss with soy sauce, sesame oil, sugar, salt, white pepper, and chopped green onions. Marinate for 20 minutes for flavor infusion.
Prepare a steamer and lightly oil a flat tray. Pour a thin layer of batter onto the tray, about 1/8 inch thick. Steam over medium-high heat for 2 minutes until translucent.
Scatter some marinated pork onto the steamed noodle sheet, cover, and steam for an additional 2–3 minutes until pork is just cooked.
Carefully roll the noodle sheet and pork filling together while still warm, using a spatula. Repeat with remaining batter and filling. Arrange rolls on a plate, drizzle soy sauce and a touch of sesame oil before serving.