Char Siu Bao

Name: Char Siu Bao
Ingredients: 2 1/2 cups (250 grams) cake flour, plus more for dusting; 1/2 cup (60 grams) sugar; 2 teaspoons (7 grams) baking powder; 2 teaspoons (7 grams) dry yeast; 1 tablespoon lard or shortening, at room temperature; Neutral oil, for the bowl; 2 cups finely diced Char Siu Cantonese Red Roasted Pork, recipe follows; 2 tablespoons grapeseed oil; 1/2 red onion, sliced; 1/2 red bell pepper, sliced; 1/2 green bell pepper, sliced; 10 scallions, cut in half; 1/3 cup sugar; 2 tablespoons (40 milliliters) oyster sauce; 2 tablespoons (40 milliliters) thin soy sauce; 1 tablespoon (20 milliliters) dark soy sauce; 4 1/2 teaspoons (25 grams) potato starch; 4 1/2 teaspoons (25 grams) cornstarch; 1/2 cup soy sauce; 1/4 cup plus 2 tablespoons hoisin sauce; 1/4 cup plus 2 tablespoons ketchup; 1/3 cup oyster sauce; 1/4 cup sugar; 1/4 cup honey; 2 tablespoons sherry; 1 tablespoon grated fresh ginger; 1 tablespoon red yeast rice powder; 1/2 teaspoon Chinese five-spice powder; 2 cloves garlic, grated; 2 pounds Boston pork butt