Lived in Indiana my whole life, my job requires me to travel and spend time in a lot of different cities, and I am always glad to get back to my little farm house in the sticks.
Personally we try to eat locally farmed foods. All the burger in my freezer is mixed 50/50 deer, and my basement is full of Ball jars. Farmers markets and the Amish are a go to as well. I grew up around bbq, and have spent many hours watching a pit. Indiana has no identity when it comes to bbq, so we just fuck around with what everybody else does.
Tenderloin sandwiches. First thing you should know is that it is made from a pork loin, not the actual tenderloin. Sliced thin and pound flat, breaded and fried. Indiana is a big pork producing state.
Chili with PB. I have no idea how this came about, and I don't care. I had to eat it in grade school, but I prefer a Texas style chili, and I'm convinced half the population of my state puts pasta in chili or makes chili "soup". Not a fan but at least it's better than that shit they serve in Cincinnati.
Corn. It's fucking everywhere, it's served everywhere, but an ear of sweetcorn right off the plant and on the grill is very good. Garden fresh tomatoes too.
Biscuits and gravy, flyover midwest staple. Beans and corn bread is a hold over from back in the day. Sweet tea at one time was hard to find, luckily people are getting with it now.
Fried chicken. Best kept secret. In southern Indiana we have "chicken houses", restaurants known for fried chicken. The best ones use smaller, banty chickens, and a lot of them pan fry.
The majority of rural Indiana is German and Dutch settled, octoberfests are always worth going to.