Also know as zucchini and once considered a delicacy, courgettes are now a popular choice in Britain. The green variety are widely available but look out for the sweeter yellow courgettes too. Look for small, firm courgettes with a bright green or yellow colour and smooth skins - they should be heavy for their size. Courgette flowers are a delicacy and are served stuffed and deep-fried in restaurants. Available all year, but better value during the summer.