1 (3 oz.) pkg. lime-flavored gelatin
1 c. boiling water
1 (8 1/4 oz.) can crushed pineapple in syrup
2 tbsp. green creme de menthe
1 c. heavy cream, whipped

Dissolve gelatin in boiling water. Add pineapple with syrup and creme de menthe. Chill until thickened, stirring often. Fold in whipped cream and spoon into a 1-quart mold. Chill and serve on a bed of lettuce.