Re:Tulsa-Chicagoland via I-44 and I-55
Slice of Pie in Rolla is a must. Ted Drewes in St Louis, frozen custard. Carl's Drive in, St Louis for hamburgers and rootbeer. Consider Crown Candy Kitchen, BLT and a malt, also OConnell's Pub for hamburgers. Amighetti's for sandwiches on the Hill.
And Cozy Dog in Springfield, Ill, - corndogs, and Darcy's Pint for a horseshoe sandwich.