Colorful eggs

Overview

I remember eating out once a few years ago. I tried it a few days ago without success, but today I succeeded

Find a clean container and brush it with oil, divide the preserved eggs into 4 parts with string and place them in the container.
Separate the egg yolks from the egg whites and add a little salt to each.
Cut ham into strips.
Place the ham sausage on the preserved eggs (I didn’t have ham sausage at home so I found grilled sausage instead). Mix the egg whites and salt thoroughly, mix well and pour it into a container. Steam it in cold water for 10 minutes.
Then beat the egg yolks into the container and continue to steam for 30-40 minutes.
Take it out and let it cool and slice it👌.