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Offal

The internal organs and innards of an animal or fish, including brain, tongue, liver, kidney, tripe, and heart.

Offal

The internal organs and innards of an animal or fish, including brain, tongue, liver, kidney, tripe, and heart.

Okra

A vegetable that is widely used in Indian, Caribbean and southern US cookery where it is an essential ingredient of gumbo; also called

Olive

Small oval fruit of the olive tree, widely cultivated in Mediterranean regions. Olives are harvested and preserved in oil or brine at various stages of development. The early olives are green, while the later, more mature olives are black. They taste very different, and black olives tend to have a more intense flavour. The fleshy pulp of the fruit is the source of olive oil. The whole fruit is available in a variety of guises: flavoured, stuffed, stoned or with stones, in oil or in brine, sliced or whole. It is used in cookery as a flavouring or garnish, an ingredient or as an hors d'oeuvre.

Olive oil

Pressed from olives, a rich fruity oil used for frying (but not deep-frying), marinades, dressings and baking. The oil from the first pressing is pure, pale greenish-yellow in colour and is much prized. The pulp is then pressed again to yield more, darker, oil. Extra virgin indicates the first press of the olives and is not suitable for cooking, though oil from subsequent pressings is. Olive oil has many health-promoting properties.

Ouzo

Greek spirit flavoured with aniseed. Like French pastis, it turns cloudy when water is added and should be served with iced water.

Oyster

A saltwater shellfish, invariably sold fresh. Can be steamed, grilled, poached or eaten raw.

Oyster mushrooms

An ear-like grey or greyish-brown bracket fungus that grows in clumps or clusters. Oyster mushrooms have a subtle flavour and are often used in Oriental cookery.