Red beans are cooked in a pressure cooker (as little as possible), and the yam is steamed.
Sugar and a small amount of water to boil, pour red beans, stir evenly on low heat; yam peeled into yam mud.
The plastic wrap is placed in a square container, and the yam mud, red beans, and yam mud are successively compacted.
Pour out, add sweet-scented osmanthus, jam, etc. according to everyone's preference.