In food processor, puree ingredients until smooth. (I use a smaller food processor and make the sorbet in batches, adding four strawberries, 3 slices banana, and a dash of sugar at a time. Each batch is slightly different. When it's all blended, I stir all the batches together.) Pour into freezer-safe bowl, cover and freeze. Garnish with fresh mint.
Varieties: Use orange juice instead of water. Blend the mint right into the sorbet. Substitute lemon juice for banana. Take out any frozen bag of mixed fruit and blend away!