1. Soak the red beans overnight, then add rock sugar according to personal taste and cook until soft
2. The red beans are soft and rotten, and when there is only a little water left (if there is too much water, you need to pour it) add 100ml of milk and simmer on low heat, stir while boiling, and press until it becomes viscous
3. Remove the edges of the toast slices, roll them thinly with a rolling pin, put the red beans in the air, smear the edges with egg yolk, and fold them in half.
4. Scratch the surface twice with a knife, and then apply a layer of egg wash
5. Put a little oil in a non-stick pan and fry until golden on both sides
