While the brisket is baking, place prepared vegetables in the pot in this order, potatoes, carrots, celery, onions and cabbage. cover and bring to another boil. Remove everything that has just softened ie cabbage, onions, celery and carrots, approx 10 minutes (no mushy vegetables!) and let potatoes continue to boil until a knife goes through easily. Drain and arrange on your platter. The salt from the corn beef will slightly season the vegetables and not over power them. Be sure to cover with foil to keep them warm.