the invention concerns a process and a plant for the production of vegetable protein as a protein rich food, and peeled sunflower seeds, a pressstufe upstream vorerw u00e4rmungseinrichtung is fed, in the peeled sunflower seeds on a def inierte temperature warms up.the preheated sunflower seeds in the at least one oil press broken pressstufe so injected that, in addition to the ausgepresstem oil, a proteinreicher sonnenblumenkern - press cakes is generated, a restfettgehalt of greater than or equal to 5 wt.% and less than or equal to 9% -% and a protein content of greater than or equal to 40%, respectively, relative to the dry matter, quality.in addition, a method and a system whereby teilgesch u00e4lte sunflower so injected, the sonnenblumenkern - press cakes a restfettgehalt of greater than or equal to 8 wt.% and less than or equal to 18 wt.% and a protein content of greater than or equal to 30% to less than or equal to 45%, based on dry matter, quality.there will also be a corresponding protein rich food or manufactured feed time.