Classic Steamed Siopao Asado Soft and fluffy How to make soft and fluffy steamed Siopao Asado or steamed meat buns. Here's what you'll need: For the filling: 2 tbsp sesame oil 1 medium size onion (sliced) 2 tbsp minced garlic 500 grams meat of your choice 2 tbsp oyster sauce (30ml) 3 tbsp soy sauce (45ml) 1 tbsp hoisin sauce (15ml) 1/3 cup sugar (65g) 1 tsp black pepper (4g) 2 cups water (500ml) For Slurry: 1 tablespoon of cornstarch to half a cup of water DOUGH: 3 cups all purpose flour (375g)