Use Bamboo Steamer

Trim the Center
Cutting the tip off a parchment paper triangle.
Snip off the very tip of the triangle.

Make Vents
Cutting ridges into a triangle of parchment paper.
Make a series of very small triangular cuts along the edges of the large triangle. This will create vent holes when you unfold the parchment in order to allow steam to circulate around the dumplings.

Unfold and Insert
Placing parchment paper round in steamer basket.
Unfold the parchment and insert it into the bamboo steamer. It should fit perfectly.

Continue Folding in Half
Folding sheet of parchment into a triangle.
Fold the triangle in half twice more to create a very long and skinny triangle.

Trim the Back End
Cutting parchment paper to fit in a steamer basket.
Place the triangle over your steamer with the tip aligned above the center of the steamer. Trim the far end until the triangle fits neatly inside the steamer.