These homemade Chinese steamed buns with scallions emerge from the steamer puffed and bouncy, feathery light in texture with a nice chew and an onion-y flavor permeating every bite. Hua Juan are mainstays of Chinese breakfasts and snacks, fluffy white vehicles to be eaten on their own or stuffed with countless fillings from barbecued pork to egg custard. This recipe is surprisingly simple to make and so, so delicious.