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["Prepare Filling: Combine soy sauce, oyster sauce, sesame oil, sugar and water and stir until sugar is dissolved; stir in cornstarch.", "Heat oil in a pan, once hot, fry shallot till fragrant.", "Slowly pour in the sauce mixture and cook until sauce thickens.", "Add diced char siew to the sauce, stir to coat well.", "Prepare dough: Sift all-purpose flour, baking powder, custard powder and icing sugar into a mixing bowl.", "Rub in the butter until mixture resembles coarse breadcrumbs.", "Stir egg into the flour mixture to make a pliable dough.", "Wrap dough in a large plastic bag (approx 20x30cm or 8x12inch) and chill for at least 30 minutes.", "Remove dough from fridge and roll it out (in the bag) to obtain a 8 x 12"" rectangle.", "Cut the edges of the plastic bag and take the dough out; divide it equally into 12 portions (use a pizza roller/dough scraper for easier cutting).", "Put some filling on each dough portion, fold it so that filling is enclosed; seal edges by crimping with a fork.", "Brush the pastries with egg wash (lightly beat egg, water and salt together).", "Bake in a preheated oven at 180-190u00b0C or 350-375u00b0F for 20 minutes until golden brown.", "Serve while they are still hot or warm."]
