Lemon Pudding Fruit Salad

This is mom's famous fruit salad, that Rod absolutely loves...

1 large (20 oz.) can pineapple chunks, drained with juice reserved
1 (15 oz.) can mandarin oranges, drained with juice reserved
1 (3 oz.) pkg. lemon jello
1 (3 oz.) pkg. lemon pudding (not instant)
1 (8 0z.) tub frozen whipped topping
2 c. fresh strawberries, sliced (optional)
2 bananas, sliced
1 c. mini marshmallows

In large saucepan, combine reserved juices and enough water to make 3 c. liquid. Bring to a boil. Mix in jello and pudding mixes. Cook and stir until thickened. Cool. Stir in whipped topping, fruit, and marshmallows. Refrigerate at least 1 hour. Serve the same day.