Chinese Steamed Pork Buns

Bahan-bahan (12 porsi)

• 1 tsp active dry yeast powder
• 1/4 cup / 65 ml warm water
• 1 tbsp white sugar
• 1/2 cup /125 ml warm water
• 4 tbsp /70g white sugar
• 2 cups / 300g plain flour ((all purpose))
• 1 cup / 155g cornflour / cornstarch
• 1/4 cup / 65 ml vegetable oil
• 2 1/2 tsp baking powder
• 1 tbsp vegetable oil
• 1/3 cup finely chopped escalot or white onion ((Note 1))
• 1 tbsp sugar
• 1 1/2 tbsp soy sauce (, regular or light (not dark))
• 1 1/2 tbsp oyster sauce ((can sub Hoisin))
• 1 tbsp sesame oil
• 1/2 cup water
• 1 tbsp cornflour dissolved in 1 tbsp water
• 1 1/2 cups Chinese Barbecue Pork (, diced (Note 2))