Drain the crushed pineapple and reserve the juice. Line a large casserole with plastic wrap, and spread the drained pineapple evenly over the plastic. Place the peeled bananas around the edge of the casserole dish. Place the casserole dish in the freezer for several hours or until fruit is thoroughly frozen. In a blender or food processor, combine the frozen fruit, reserved pineapple juice, and the remaining ingredients, and blend until smooth. Serve immediately in chilled glass.

Serves 6