Here is the first thing worth knowing about fava, and it is the thing that confuses almost everyone the first time they encounter it: there are no fava beans in it. In Greek, fava refers to yellow split peas, not the broad beans that the word fava means in English. The dish is a thick, smooth, golden purée made from those split peas, slow-cooked with onion until they break down completely, then blended with olive oil and lemon into something that sits somewhere between a dip,