Fruit, potatoes and cauliflower often take on a greyish tinge during the cooking process and lose their appetising appearance. To ensure that the fruit or vegetables retain their bright colour, you can add a spoonful of fresh lemon juice to the cooking water before cooking.

 

Sliced fresh fruit, especially bananas and apples, will turn brown if they are left to air for a few hours. The fruit in the fruit salad will stay nice and fresh and won't tarnish if you use fresh lemon juice as a dressing.