Combine
mashed banana and Pina Colada mixer in large bowl; set aside.
Drain mandarin orange liquid into a 2-cup
measuring cup; sprinkle gelatin over top. Let stand 5 minutes, then heat
mixture on stovetop or in microwave (1 to 1½ minutes on high) until
steaming. Stir until gelatin is dissolved, then add enough water to
equal 1¾ cups of liquid; stir gelatin into banana mixture.
Blend in lemon juice, oranges and coloring.
Chill until almost set.
Fold in 4 ounces of the whipped topping and ¼
cup of the coconut.
Line a 9" x 5" loaf pan with plastic
wrap. Arrange 10 ladyfinger halves, split side down, over bottom of pan.
Combine rum with 2 tablespoons of water; drizzle one third of the
mixture over ladyfingers, followed by one third of the gelatin. Repeat
layers, ending with 14 ladyfinger halves. Cover and chill at least 4
hours.
Invert loaf onto plate; remove plastic, then
frost top and sides with remaining whipped topping. Press remaining
coconut against top and sides of cake. Chill.
Note: Pina
Colada drink mixer is available in the frozen juice section of grocery
stores.
9 to 10 servings