Tiger Nut

Cyperus esculentus, also called chufa, tiger nut, atadwe, yellow nutsedge and earth almond, is a sedge widespread across much of the Eastern Hemisphere. It is cultivated for its edible tubers, called tiger nuts or earth almonds, which are used for snacks and for the drink horchata de chufa. Wikipedia says it was one of the oldest cultivated plants in prehistoric and ancient Egypt, where it was an important food. Dry tubers appear in tombs of the Predynastic period, around 3000 BC. The article says they were also used medicinally, taken orally, as an ointment or as an enema, and in fumigants to sweeten the smell of homes or clothing. The tomb of the vizier Rekhmire, from the 15th century BCE, shows peasants preparing tiger nuts to make votive cakes as offerings to the god Amun.