Falafel is a deep-fried ball of ground chickpeas (sometimes fava beans, too) mixed with cayenne pepper, cumin, salt, pepper, either cilantro or parsley, and sometimes bulghur wheat. It ranges from about the size of a ping pong ball to somewhat smaller.
The classic presentation is one or two balls in a pita, with a chopped vegetable salad and a sauce made of tahini (sesame paste) and lemon.
It’s delicious, filling, and quite addictive. You can buy a fairly good mix from Near East, add water, and fry up a batch. Get very fresh pita, and chop tomatoes, cucumbers, parsley and onions to stuff in the pita with it. I add fresh chopped cilantro to the Near East mix. Make sure you dry it well , or it will make the batter too watery.
Try it. Awesome stuff. A little hummus with the falafel is a must!