I have to say Joseph's Pizza in Glendale Heights has the best pizza I've had since moving out of the city of Chicago. They also have by far the best beef sandwiches. From what I'm told, the beef is cooked on the premises by the owner and adds just the right seasonings. My other favorite item on the menu are they hot wings. They are hot but meaty wings. I've brought them to various parties and everyone just ranted and raved about the wings.
I recommended catering from here for our Christmas party and all my co-workers suggested we order from them all the time. They talked about the beef the most as well as the pasta with marinara sauce.
Definitely give them a try!