Preparation of ingredients for red bean roll with milk skin: 800ml whole milk 300 g fermented grains 100 g red bean paste 2 tablespoons sugar 1. Pour the fermented rice into a porcelain bowl covered with gauze, squeeze out the fermented rice juice as much as possible, and take 200 g for later use. 2. Pour the milk into the pot and heat it on low heat until there are small bubbles around it. 3. Pour in 2 tablespoons of sugar and mix well. Pour all the brewing juice into the milk and continue to stir and heat. 4. Slowly, the milk will change from liquid to cotton wool, and continue to stir and heat. The bottom layer is slightly green and translucent whey. Turn off the fire at this time. 5. Take out the cotton wool milk on the surface and pour it on the emery cloth for filtration. 6. After 5 minutes, lift the gauze, hold it tightly with your hands, squeeze out the whey as much as possible, and knead the dough milk for a while to make it more delicate. 7. Spread a layer of plastic wrap on the chopping board. Spread the dough-like milk on the plastic wrap, cover it with a layer of plastic wrap, and roll it into a rectangle with a rolling pin. 8. Press the bean paste into a rectangle and put it on the milk skin. 9. Roll it up slowly and put it in the refrigerator 1 hour. Then cut it into small pieces. Cooking tips: 1. Be sure to choose whole milk, the ratio of milk to mash is 4: 65433. 2. Pour the filtered whey into a container, which can be drunk directly or eaten after refrigeration. Nutrition tip: Red beans are rich in cellulose. Eating red beans helps to supplement cellulose, promote baby's gastrointestinal digestion, increase baby's appetite, promote baby's detoxification and defecation, help baby excrete toxins and protect baby's gastrointestinal health. Red beans are rich in phosphorus and can promote the healthy development of baby's bones and teeth. Protein, which is rich in red beans, can supplement protein, improve immunity, enhance resistance, and contribute to the healthy growth of babies. Supplementary minerals in red beans help to maintain your baby's normal basal metabolism. Red beans are fragrant, and babies often don't like them. Eating red beans for your baby will help attract your baby and help him develop a good habit of eating. However, red beans are very diuretic and laxative. Baby should pay attention to controlling weight when eating red beans, and don't eat too much, otherwise it will be easy to have diarrhea, which is not good for baby's gastrointestinal health.