Curled lettuce

Oak leaf originally comes from the USA, but is now mainly grown in Spain, Italy and France.
Its delicate leaves range in colour from deep red to bright green. It is known for its mild, slightly nutty flavour.

Although lettuces contain fewer minerals and vitamins, they can score points with their high fibre content.
Oak leaf also contains vitamin C, folic acid, iron and potassium.

Ideally wrapped in a damp kitchen towel, oak leaves will keep for one to two days in the vegetable compartment of the fridge.