1. Steam the purple sweet potatoes in a pot, peel them, add a little water and puree them with a food processor. Divide them into 25g portions and group them into round balls for later use.
2. Put all the ingredients except butter into the bread machine, knead it into a smooth dough, add butter, knead until the film is formed.
3. The basic fermentation is 2 times larger.
4. Take out the exhaust gas, divide into 6 parts, round and relax for 15 minutes.
5. Take a portion of the dough, roll it out into a round shape, and pack a portion of purple potato filling.
6. After wrapping, roll it out again into an oval shape, and make four cuts in it with a knife.
7. Twist the dough in opposite directions with both hands, tie a knot, and put it in a paper mold.
8. Put it in a warm and moist place and ferment again to 2 times the size, brush with egg liquid, sprinkle a little white sesame seeds, put it in the preheated oven, and heat the middle layer up and down at 180 degrees for 15 minutes.
Tips:When making a knife on the dough, be careful not to cut through.
