Bananas brown quickly once peeled unless tossed in citrus juices. In recipes without citrus juices you should prepare them last and add them just before cooking. If your bananas are delivered to you and are still slightly green, don't worry, as they will continue to ripen. Storing them with other fruit will cause the other fruit to ripen more quickly, so they are best stored separately.

Blueberries need very little preparation — just wash them gently and dry them on a clean tea towel. If you're not going to eat them straight away you should store blueberries in the fridge, preferably in a shallow tray. If you want to keep them for longer, then blueberries freeze well.

Don’t forget to wash your fruit and veg before use.