One of the first foods I tried when I arrived in Paraguay years ago was the Chipa. My first impression was that it tasted like cheese crackers. Chipa is mostly made from mandioca starch, cheese, eggs, pork lard, and milk.
It is baked in a special brick oven called a "tatakua" in Guarani. Most chipa is shaped like a donut or bagel, but some is oval shaped and solid. You will see chipa venders take the streets usually in the afternoons. They carry the chipa baskets on their heads as they walk along yelling out "chiiipaaa".