Lime Jello Salad

Directions

1. 1
   Dissolve Jell-O in boiling water.
2. 2
   Add cold water and vinegar. Chill until thick (1 1/2 hours).
3. 3
   Pour 1/2 cup of thick Jell-O into 9 x 5-inch loaf pan.
4. 4
   Put 3 pineapple rings in 1 cup of thick Jell-O.
5. 5
   Fold in banana slices and spoon into pan.
6. 6
   Chill until set, but not firm, about 15 minutes.
7. 7
   Blend mayonnaise in rest of Jell-O until smooth.
8. 8
   Stir in celery and spoon into pan.
9. 9
   Chill until firm, 4 hours or overnight.
10. 10
    Unmold and slice.
11. 11
    Serve on lettuce leaf.