Stick your unpeeled bananas and mango cheeks in the freezer ahead of time to create this delicious cooling sorbet with chia seeds. Once the fruit is frozen add it to a blender with lemon zest and juice and blend until it's smooth. Then add some chia seeds and mint for interest – you could add honey or sugar if you have a sweeter tooth – and serve with passion fruit seeds or blueberries. Great for dessert or for breakfast