1. Put all ingredients except butter in the material into the bread machine, and run an IMIX program for 20 minutes
2. Purple sweet potato shreds and set aside
3. After the program ends, add softened butter and continue to run an IMIX program for 25 minutes
4. 5 minutes before the end of the program, add purple potato shreds
5. Knead
6. Select the fermentation program for 50 minutes, and ferment to 2 times the size
7. Cut the sausage vertically, divide it into three, and then cut a few pieces at both ends
8. Take out the fermented dough, knead and vent, divide into 30 equal parts, knead and let stand for 15 minutes
9. Take out the dough, roll it round, 5 slices in a group, take a sausage and put it on the bottom
10. Roll up from bottom to top
11. Cut in the middle with a sharp knife
12. Take 6 copies of the code into the hollow mold
13. Cover with plastic wrap and ferment in the oven to 2 times the size (also can be fermented at room temperature)
14. After the fermentation is complete, put it in the middle layer of the preheated oven and heat up and down at 160 degrees for 20 minutes
Tips:This can be used to make two 7-inch hollow molds
