In a measuring cup, combine the water and bouillon powder or use chicken stock.
250 ml water, 1 tsp chicken or mushroom bouillon
Place the water-bouillon mixture into a saucepan over medium heat.
When stock comes to a boil, at the chopped BBQ pork, jicama and Chinese sausage.
300 g Cha Siu / BBQ pork, 100 g chopped jicama, 2 sticks Chinese sausage
Stir until boiling.
Stir the cornstarch slurry to ensure that the cornstarch is well incorporated. Add the slurry to the meat mixture.
Immediately stir the meat mixture until the slurry thickens into a thick paste. Cook for a few minutes.
Remove from the heat and allow to cool while making the dough.
Dough
Combine the warm water, milk, and sugar in a container.
120 ml warm water, 120 ml warm milk, 2 Tbsp sugar
Add the dry yeast and stir to combine.
1 Tbsp instant dry yeast
Rest for 20 minutes until bubbly.
Add the dry ingredients into the bowl of a stand mixer.
400 grams cake flour or all purpose flour, ½ tsp baking powder, ¼ tsp salt, 1 Tbsp sugar
Add oil.
2 Tbsp cooking oil.
Add the liquid yeast mixture into the flour mixture.
Using a dough hook, knead the dough until well combined, soft and pliable. (10 mins)
On a floured surface, briefly knead the dough into a ball and allow to rest for 1 hour or until double in size.
Knead the dough again and roll the dough into a rectangle ¼" (.64 cm) in height.
Using a 3 1/16" (78mm) cookie dough cutter, cut the dough into circles.
Collect the dough scraps, knead the excess dough, roll and cut dough circles until all the dough is used up.
Roll the smaller circles to about 4" (10cm), making the edges thinner than the center.
Heap a large tablespoon of cooled filling into the center of the dough.
Pleat the edges in the center until completely sealed. See video.
Place sealed bun on a piece of parchment paper to avoid sticking to the steamer.
Allow to rest until the dough rises a little (15 minutes).
Steam for 8-10 minutes. If not using a bamboo steamer, make sure that the steam doesn't drip back onto the buns in the steamer by covering the lid of the steamer with a dish-towel, securing the towel ends onto the lid (or with binder clips.) This will allow the steam to be absorbed into the dish towel.