1 (20 oz.) can undrained crushed pineapple
1 sm. pkg. dry lime Jello
1 pkg. crushed Kraft Butter Mints
1 sm. container Cool Whip
Chopped nuts

Mix pineapple and Jello; let stand in refrigerator overnight. Add mints, Cool Whip and nuts. Freeze. Shortly before serving, remove from freezer and allow to soften slightly. Cut into squares and serve on lettuce leaves.