1 fresh pineapple, sliced into small chunks
1/3 bag of frozen berries (I use the Berry mix from Costco--it has blueberries, marionberries, and rasberries) (also, this is not an exact science--I just add as much as I want)
4 bananas, sliced
Combine in a large bowl and let the frozen berries thaw. Stir to mix again once thawed. The juice from the frozen berries coats everything and takes the place of any sweetners, etc.