Cucumber Jell-O Salad

1 small box lime Jell-O
3/4 cup boiling water
1/4 cup lemon juice
1 small onion, grated
1/2 cup margarine
1/2 cup sour cream
1 cup unpeeled grated cucumber

Dissolve Jell-O in boiling water. Add lemon juice and remaining ingredients. Chill in refrigerator to jell.

Makes 4-5 large servings.