Although the plump, pear-shaped variety, with its near-black shiny-skinned exterior, is probably the most familiar in Britain, aubergines come in a wide variety of shapes, colours and sizes. Italian cooks enjoy varieties with long fruit and striking lavender and cream streaks. Asian cultivars vary widely: some, such as the bitter-flavoured pea aubergine, are the size of a grape; the seed-filled, rounded Thai aubergine has green stripes and is used in curries; the beautifully long and slender pale-purple Japanese and Chinese varieties are ideal for stir-frying. The aubergine can also be ivory-coloured and ovoid, which almost certainly led people in some countries to name it the ‘eggplant’.
Aubergines can be bought all year round but they are at their best, not to mention cheapest, from July to September. Look for unblemished, firm, lustrous skin with a bright green calyx, or stem. Home-grown aubergines are available from April to October in the UK.