Beef stuffed bun

Ingredients: Wheat flour 33%, beef 23%, water, spicy bean paste (wheat flour), onion, sunflower oil, spring onion, sugar, ginger, soy sauce (soybeans, wheat flour, preservative [E202]), cooking wine, oyster sauce (oyster extract, wheat flour), salt, sesame oil, black pepper, sodium bicarbonate (E500), yeast, rice, baking powder (raising agent (sodium acid pyrophosphate (E450), sodium carbonate (E500), sodium bicarbonate, sourdough starter (wheat)