Bao with Pulled Mushroom in BBQ Sauce

Bao Buns

• 5 ½ oz whole milk
• 1 tsp sugar
• 1 tsp active dry yeast
• olive oil, to grease
• 7 ½ oz all-purpose flour
• ½ tsp baking powder

Pickled Onions

• 2 oz red onion, thinly sliced
• 2 oz rice vinegar
• 1 ½ tsp sugar
• 1 ½ tsp salt

Mushrooms in Barbecue Sauce

• 3 green onions, cut into pieces, plus extra, sliced, to garnish
• 1 fresh red chili, deseeded, cut into pieces, plus extra to garnish
• ½ oz fresh ginger, cut into pieces
• 3 garlic cloves
• 20 oz olive oil, plus extra to brush
• 16 oz fresh king oyster mushrooms, trimmed
• 2 ½ oz barbecue sauce
• 1 ½ oz soy sauce, plus extra to serve
• 21 oz water, divided
• cilantro leaves, to garnish
• sesame seeds, to sprinkle