Steamed bao buns, and beef steak with creamy butter sauce

Steamed bao buns: 360 g flour, 150 ml warm water, 1 1/2 tsp yeast, 1/2 tsp sugar, 1 tbsp soft butter. Filling: 200 g ground pork, pepper, 1/2 tbsp soy sauce, 1/2 tbsp oyster sauce, 1/2 fish sauce, 1 tsp dark soy sauce, 1/8 cup chicken stock, 1 onion, 5 garlic cloves, 2 spring onions, 2 tbsp veg oil, anise, cloves, cinnamon, fennel

Grilled beef steak with creamy butter sauce: steaks, salt, egg yolks, butter