Cheese
Coincidentally, my wife and I went to our favorite pizza restaurant, Grimaldi’s, and I didn’t even get my favorite pizza (yes, just cheese). I got a big-ass spinach salad. It…wasn’t quite as satisfying. But my wine was half-price. So there’s that.
Some vegetarians also eat eggs. Not sure how that fits onto the “canonical” vegetarianism, though I do know that vegans don’t eat any animal products.
(As opposed to Las Vegans, who by and large devour lots of prime rib every weekend. There are obviously exceptions, however. 🙂 )