For lower MI, there's a pretty good diner on the field at KOEB (Coldwater). I *think* it's called the Crosswinds Cafe, but it's been a while so I may be mixing the name up with somewhere else.
The Airport Restaurant and Spirits at KJXN (Jackson) is very nice, has decent food and offers a great view of the runways from inside.
Though a little farther, there's also the Liberty Diner on field at 3DA (Flushing) and, about a block away west along the road, an excellent little Italian/American family place called Sorrento's.