. (A) chroma a*, (B) chroma b*, (C) Optimum cooking time (OCT) (min), (D) mass increase (MI) (g 100 g1) and (E) loss of solids (LS) (g 100 g1) as a function of the proportionsof dried potato pulp (DPP), extruded potato pulp waste (EPP) and amaranth flour (AF) in the formulations of fresh spaghetti.