1. Prepare ingredients: milk, eggs, purple sweet potato, white sugar (I'm sorry, I missed the photo of the flour), please forgive me, please forgive me!
2. Remove the head and stem of the purple sweet potato, slice it and steam it in a steamer.
3. Use a spoon to puree.
4. Use only the yolk for 3 eggs.
5. Add a tablespoon of flour and some milk.
6. Stir into a smooth egg yolk paste.
7. Spread oil in the pan, heat up the pan, pour in the egg yolk paste, fry both sides and scoop out the omelette.
8. The omelet is coated with mashed purple potato and rolled up.
9. Then cut open the plate, the egg yolk purple potato roll is ready.
