Char Siu Bao-Baked Buns Recipe

Name: Char Siu Bao-Baked Buns Recipe
Prep time: 20 min
Cook time: 10 min
Total time: 30 min
Cuisine: Chinese
Ingredients: 2 cups leftover char siu dices; 100 ml water; 1 tbsp. cornstarch; 1 tbsp. light soy sauce; 1 tbsp. oyster sauce; 1 tbsp. hoisin sauce; 1 tbsp. sugar; 20 g 2 tbsp. flour; 100 g 100ml water; 195 g 1+1/2 cup bread flour; 90 g 3/4 cupcake flour; 6 g 2 tsp.instant yeast; 30 g 2 tbsp. sugar(or reduce to 10g for a salty bun); 3 g 1/2 tsp.salt (or extra 3g for a salty bun); 1 middle size egg; 80 g scant 1/4 cup milk; 45 g 3 and 1/2 tbsp.unsalted butter, softened under room temperature; 1 egg whisked + 1 tbsp. water; 1 teaspoon roasted sesame seeds; 1 tablespoon melted unsalted butter