Many of the road side restaurants you will find beside highway BR 369 heading southwest from Maringa are quite huge establishments that are aimed at serving a large amount of food very fast, and are primarily for the rest stops of the large intercity and tourist buses headed for Foz do Iguacu.
Many others are smaller restaurants that are bypassed by this tourist traffic, but are aimed more for small groups and individuals on the highway.
The Posto Piquirivai is one of these smaller establishments. The restaurant is hidden behind a gasoline station and next to the local mechanic's shop. Items available here include some of the standard convenience store items, such as soft drinks of all sorts, and typical Brazilian snack foods such as a small selection of Pastels and Fried Pocket Breads.
For a fixed price, you can also have an entire self-service plate from the hot food selections in the dining room. Upon my visit this included a pasta dish, potato, and various other goods that make great road food.