Chicago to NOLA on I-55
The Velvet Cream in Hernando, MS is a great old-fashioned malt shop/drive thru. It's not far off of I-55 and would be a good stop. You have to stop at Middendorf's in Manchac, LA. It's right off the interstate, and if you like catfish, you will love them. Go for their thin catfish - there's nothing else like it.