Mbej, a truly unique, beautiful, and delicious cheesy Paraguayan flatbread made with cassava flour. Mbeju is a starch cake with farina or manioc flour. The mbeju is a staple typical of Paraguay. It is a savory flatbread, made with a cassava or starch flour lots of cheese and bound together. The grain-free Paraguayan flat bread doesn't require any regular flour whic can be a great news for the diet.