The Cellar Pizzeria and Pub is a restaurant located at 51 North Prairie. The owners are really nice, and the food is great. They do pasta and some other stuff, but they're most famous for their pizza. You can order by the slice, which makes dining there very affordable for lighter eaters, as well as allowing one to try several of their eclectic pizza varieties.
Their deal on Mondays (wherein a large dine-in pizza is half-price) is, well, a great deal. They also deliver during dinner hours.