2 (3 oz.) pkg. orange Jell-O
1 (6 oz.) can frozen orange juice (do not add water)
1 c. small marshmallows
1 1/3 c. boiling water
1 (20 oz.) can crushed pineapple
1 (11 oz.) can mandarin oranges
1/4 c. chopped pecans

Dissolve Jell-O in boiling water. Cool slightly. Add frozen orange juice, stirring until completely dissolved. Chill until slightly runny. Add pineapple, oranges, marshmallows and pecans. Pour in 11 x 8 pan. Chill until set. Serve on lettuce leaf and top with mayonnaise (optional).