Baked Barbecued Pork Buns

Ingredients

• 1 pkg dry active yeast
• 2 tsps baking powder
• 1 Tbsp corn oil
• 2 tsps cornstarch
• 1 egg
• 468.75 g flour plus extra
• 1 tsp fresh ginger
• 2 green onions
• 2 tsps hoisin sauce
• 244 ml milk heated
• 2 tsps oyster sauce
• 453.59 g diced cantonese barbecued pork
• 0.5 tsps salt
• 1 Tbsp asian sesame oil
• 0.5 tsps dark soy sauce
• 1 tsp sugar
• 3 Tbsps sugar
• 59.15 ml vegetable oil
• 118.29 ml water
• 1 Tbsp water
• 1 small yellow diced onion
• 2 tsps corn oil