Char siu pork bao

Name: Char siu pork bao
Prep time: 20 min
Cook time: 2 h 10 min
Total time: 2 h 10 min
Yield: 12 pieces
Ingredients: 170 g water; 2 tsp white sugar; 2 tsp dried instant yeast; 300 g plain flour; 30 g extra virgin olive oil; 2 tsp baking powder; 1 tsp sea salt; 3 cm piece fresh ginger; 50 g soy sauce; 1 tsp beetroot powder; 50 g hoisin sauce; 50 g honey; 50 g Chinese cooking wine; 30 g brown sugar; 1 tsp Chinese five spice; 2 pinches ground white pepper; 450 g pork fillet; 500 g water; plain flour; extra virgin olive oil; 600 g hot water; 1 ½ tbsp Kewpie mayonnaise; 6 leaves iceberg lettuce; 1 Lebanese cucumber; 3 spring onions/green onions; hoi sin sauce