When the dough has doubled, remove from the bowl and punch down to remove all the bubbles that have formed during the rising process.
Sprinkle some flour or baking powder on the working surface.
Work the dough for 2-3 minutes. Using your hands, make a hole in the middle, then cut 12 equal parts.
Flatten each ball with your palm, and a roller, working only on the edges making sure to keep the middle thicker so that the buns don’t turnout soggy after being steamed.
Place one or 2 tbsp of filling in the middle.
Hold the disc in the palm of one hand and start folding/pleating with the other while turning the bun until completed. You can leave a small hole in the middle or close the buns until it forms a nice spiral on top.
Cut small squares of parchment paper. Place each bun on one of them. Let them rise another 15 minutes. Don't skip that step!