Falafel can be made with either fava beans or chickpeas. The following traditional falafel recipe contains methods for using either legume. Historically, early versions of falafel were made with fava beans (and even earlier versions were made of lentils). Consequently, fava beans are still the falafel "legume of choice" in Egypt and other Arab countries. On the other hand, Israeli falafel is almost universally made from chickpeas. This is because many Jews have a medical deficiency called G6PD, a hereditary enzymatic deficiency that can be triggered by fava beans. Chickpeas, or garbanzo beans, provide the perfect substitute.