Black peppercorns, the fruit of a perennial vine with large leaves and white flowers. Green peppercorns are the unripe fruits picked early and pickled. Black peppercorns are picked just before they ripen and white peppercorns are the ripe, black peppercorns with the black skin flaked off. They are best kept whole and ground when required. Historically, pepper was one of the world's most important spices. Columbus sailed West, not East, in search of pepper in the East Indies. Instead he found the Americas and allspice.
Mango powder. A very sour flavouring agent with a slightly fruit flavour made from dried under-ripe mangoes, rather similar to tamarind in cooking.
Poppy seeds, from the seed of the opium poppy. They are improved by roasting and are used for thickening curries instead of cornflours or other starches.