No need to, I fry mine in a skillet, strain the fat and refrigerate for the next time.
The beauty of this recipe is the way it holds together. The fat is very clean after cooking. Other falafels leave so much debris, that burns to a crispy black, that it leaves a bad taste and you don't want to save the fat. This recipe is falafel perfection. It reminds me of the falafel I used to buy in NYC. It truly is the technique for soaking the dry garbanzos and grinding them I think. And as Evelyn says, DO NOT USE CANNED. You'll be sorry!