Make Triangle Fold

Frozen dumplings will stick to the bamboo inside a steamer, so you need to line it first. If you’ve got some Napa cabbage in the fridge, the leaves make great steamer liners. Alternatively, you can use parchment paper to make a breathable non-stick surface. Once you get the hang of it, you can make one in about the time it takes to bring the water in the wok to steaming-level. Here’s how.

Cutting parchment paper to add to steamer basket.
Fold in Half
Folding parchment paper in half.
Fold a sheet of parchment paper with a length and width of at least the diameter of your steamer in half.

Fold in Half Again
Folding parchment paper in quarters.
Fold it in half the other direction, creating a rectangle.

Fold Into a Triangle
Folding parchment into a triangle
Fold the rectangle into a triangle, making sure that the tip of the new fold lies at the main vertex of the original rectangle (the spot that used to be the center of the full sheet).