Marion exit: 17th Street Bar and Grill. Mike Mills is a 3 time winner of the Memphis in May BBQ cook off. His original location in Murphysboro has more character but the food at the Marion restaurant is good too.
Also at Marion exit, head west to Herrin. Louie's P & R. Italian deli. All kinds of sandwiches and salads.
West Frankfort exit: Mike's Drive In. Car hops and all. A throwback to the old A&W type drive ins. I like the pork tenderloin sandwich here...also the onion rings. And, of course, root beer in a mug.
Benton exit: Go west on Illinois 14 a few miles to Christopher to the Maid Rite Cafe. "Loose meat" sandwiches and good pie.
Ina exit. Uncle Joe's BBQ.