If I want a great homestyle hamburger in Haviland where should I go?

It's not really in Haviland (if we're going to go by the borders on the map given), but one place where I've heard the burgers are good is called the Hyde Park Brewing Company restaurant. This eatery is just a little outside Haviland but it seems to be of respectable quality.

As far as something in Haviland, I don't know of any burger joints in particular.