Start cooking the chicken broth with the egg. To do this, place the meat in a saucepan and pour in cold water. Add salt and a whole onion. Put on high heat. It will boil in 10 minutes. Remove the foam, reduce the heat to low. Cook for 60 minutes.
Prepare the eggs. Peel them and cut them into slices.
Finish making the egg broth. Remove the chicken, separate the meat from the bone and return it to the pan. The broth is ready. When serving, add the egg directly to the bowl.