A special note about unincorporated community of Peru, it is not to be confused with the township of Peru in Dubuque County. Neither is it to be confused with the South American country of Peru. But together with the incorporated town of 153 people next door known as East Peru, the area around here is sometimes referred to simply as Peru. During my visit I did not have time to verify correct pronunciation, but I assume it is to be pronounced like "pee roo". Wikipedia tells me Old Peru had an operating Post Office from 1853 to 1903. The google maps profile had ads for "Peru Holidays Packages" and "Thousands of Brides from Peru", I assume they are referring to the South American country with the same name.
Location: google says the address is 113 Brown St. on the main street with two or three occupied buildings in Old Peru, about 45 minutes from Des Moines in Madison County.
Directions: East Peru is on County Road G68, sometimes listed as Peru Road. You can reach Peru Road by taking I-35 to the Truro exit, or taking State Highway 169 south from Winterset.
Price: $4.75
Ambiance: This is a dive bar with the regular beer posters on the wall, there is a big banner that reads "Welcome Hunters". Some fly traps were hanging from the ceiling, but those types of things add "flavor" to a place like this. Seating is available at the bar or at tables, or there is a picnic table across the street.
Final thoughts: This may be the closest authentic small town pub and grub with a homemade tenderloin to Des Moines. The travel on the winding county roads in rural Madison County makes the trip feel longer than it truly is. The fact that this area is not on the trail of the covered bridges probably means that few visitors make it out here.

The Tenderloin: This one falls into the category of thin cut pieces of pork loin. The breading is cooked better and browned more on one side. The breading was a little dusty and had not grease dripping off. This is a little on the thin side and is not big. Overall, a not-impressed 5.5 out of ten.
Also on the menu: A full breakfast menu with sandwiches for lunch and dinner specials
Final Thoughts: This is a cafe with great ambiance in the main square of
Winterset is the home of John Wayne, and is located between the covered bridges immortalized in a Robert James Waller novel. The tourism has dried up in the decade-plus since the film came out, and the town isn't touched by commuters from Des Moines as often as its location would lead you to believe. It is home to a former one-stop diner and gas station on the south side of town. The Starlight Cafe does not impress from outside, but has a worthy tenderloin to give its customers.
The Tenderloin: The "Giant Breaded Tenderloin" described on the menu came after a 5 minute wait. The meat inside was a good consistent white color and mostly steamy and moist inside. The whole thing was a little thicker on one side, and roughly triangular in shape This gets a half-point deduction for the parallel marks along the top from being frozen after breading. The breading has little grease of crumbs to leave on your fingers or the plate. Overall an impressive and large tenderloin. Served on a lightly toasted bun. 7.5/10
Price: $4.99 for the sandwich with whatever fixings you choose.
Also on the menu: a full breakfast menu, homemade mashed potatoes, fried chicken, sandwiches and ice cream.