Put pot of water on stove to boil. Add a dash of salt.Peel potatoes and cut up into bite-size pieces. Put potatoes and eggs in pot of water. While cooking, mix mayonnaise, mustard, onion, relish & seasonings in bowl. Put aside. Boil potatoes and eggs until , then drain in collander. Remove eggs from pot, discard shells and cut egg into small pieces. Stir in mayonnaise mixture with potatoes and eggs. Voila!