6 Leeks washed and trimmed 2 c Cooked chicken breast 4 tb Butter 2 qt Chicken broth 4 Stalks of celery sliced 1 Egg yolk 2 Carrots cleaned and sliced 1 t Salt 1 t Pepper 1. Slice cleaned leeks into 1/2" slices. Melt butter in a large skillet and add leeks, carrots, and celery, cook until lightly browned. 2. Add all but 2 cups of chicken broth from the boiled chicken to the skillet. 3. Add the chicken breast cut up into small cubes. 4. Cover and simmer for approx 2 hours. 5. In the 2 cups of chicken broth you saved add the egg yolk to it and mix well. Add this to the skillet and continue cooking for another 3 mins.