You’re thinking of Scandinavian regional delicacies and certain seasonal special dishes, none of which I’ve ever had the misfortune of smelling, and serving those to prisoners does sound pretty inhumane. All Scandinavian food outside of those that I’ve tried or heard of tasted or sounded delicious.
Those scenes are just there to establish that he’s capable, intelligent and talented in the ways the agency needs, so it’s plausible they would recruit him. Never-mind that they also establish the way he looks at the world and approaches problems which is then forgotten immediately.