Pour milk into freezer tray.
Freeze till edges are icy.
Drain pears, reserving syrup.
Add water to make 1 cup; bring to boil.
Dissolve gelatin in boiling liquid.
Chill till partially set.
Gradually add milk to gelatin, whipping till double.
Slice bananas; sprinkle with lemon juice.
Fold fruits into gelatin.
Pour the mixture into a 6 1/2-cup ring mold.
Chill mixture till firm.
Unnlold on lettuce.