This is a recipe for moist steamed bread made with rice flour and sweet potato that can be made in just 3 minutes and 30 seconds in the microwave. Diced sweet potato is heated in the microwave, and then the batter is made by mixing sugar, egg, melted butter, and milk, to which rice flour and baking powder are added. The sweet potato is mixed into the batter, placed in a heat-resistant container, and then topped with the remaining sweet potato and black sesame seeds. Heat in the microwave again, and fluffy, chewy steamed bread is ready. It is delicious as is, but you can also enjoy variations such as toasting it to give it a golden brown color or adding honey. Since it uses rice flour, it is a gluten-free and easy-to-make healthy snack.