Judy's recipe is almost exactly how I make mine.
I, however, use 1/3 lamb, 1/3 beef, 1/3 pork. Cevapcici can be pretty much with any combination of these four meats: lamb, pork, beef, veal. I've had cevapi all across the former Yugoslavia, and the best (to me anyway) were invariably Bosnian cevapcici, which pretty much always contained lamb or a combination of lamb and beef or veal. In Zagreb or Belgrade, most of the cevapi I've come across did not contain lamb.
Instead of using salt, Vegeta (a powdered vegetable stock type product made by a company called Podravka in Croatia. You can find it in most Eastern European grocers in Chicago, and many Jewels and Dominicks) adds a very nice tang. I picked up this tip from a Croat. Normally, I absolutely detest the sharp taste of Vegeta, but it works very well with cevapi.
Everything else I'd leave the same. You can also shape them into patties and basically have what's known as "pljeskavica," or, sometimes, "Serbian hamburgers."
Serve with coarsely chopped raw onions, ajvar, and pita.
edit: One more thing. Be sure to use nice, fatty meat. You don't really want to use something like sirloin--80% lean or less ground chuck is better.