1/2 c. chopped pecans
1 (15 1/4 oz.) can pineapple chunks, drained
1 (16 oz.) can pitted dark sweet cherries
1 (12 oz.) Cool Whip
1 (8 oz.) lemon flavor yogurt
1/2 c. mayonnaise

Combine all and pour into 12x2x8 pan. Freeze until firm. Cut into squares.