1 pkg. lemon jello
1 c. boiling water
3/4 c. mayonnaise or salad dressing
1 can corned beef, chopped
2 hard boiled eggs, chopped
1 med. onion, chopped
1/2 tsp. vinegar

Dissolve jello in boiling water. Add mayonnaise and vinegar. Chill. Add remaining ingredients. Place in mold and chill until ready to serve.