An edible protein-containing meal for human and animal consumption and high quality food grade oils are obtained from oil seeds and other oil and protein containing plants. The meal has a significantly improved level of dietary available (absorbable) protein. The protein is substantially free of oils and fats, and is a cleaner, purer product with high levels of absorbable protein. Such protein isolates can be used as such or added to formulated foods in order to increase the total protein content of that food. The meal produced and the oils recovered have compositions which are unique and unobtainable by prior processing methods, having a greater content of proteins, the proteins having a greater solubility and an increased ratio of high to medium molecular weight proteins.