Although cereals and starch-based products are the main source
of ingredients in ready to eat breakfast formulations obtained by
extrusion, other starchy sources coming from roots and tubers can
also be employed. Major structural changes occurring as a result
of heating during extrusion play an important role in the texture
of the final product. This is established during the expansion phenomena,
which finisheswhenthe cooling material goes through the
glass transition temperature region (