The classic Thanh Trì version is often served with no filling at all — just thin plain sheets eaten with fried shallots, chả lụa and dipping sauce.
A thin, near-translucent sheet of steamed rice batter is filled with minced pork and wood-ear mushroom, rolled, and topped with crispy fried shallots, served with slices of Vietnamese sausage and a light fish-sauce dip. Hanoi vendors often steam the batter to order, peeling each sheet straight off the cloth before rolling it while still warm.