It's a pancake made almost entirely from tree-root starch, with no wheat flour at all, yet it holds together in a crisp, lacy disc.
Mbeju is a golden, crumbly griddle cake made from almidón (cassava starch) mixed with cheese, egg, and a little milk or lard, then cooked on a hot flat pan until it sets into a lacy, semi-crisp disc. A staple breakfast and afternoon snack across Paraguay, sold hot off griddles at markets and roadside stalls alongside mate or tereré.