There's a pretty big corporation out there that employs flight techs (A/P mechanic) instead of cabin or flight attendants in their Pt 91 flight department, the grease monkeys are expected to take care of the passengers. A good friend of mine that fancies himself a bit of a chef got hired there a long time ago. Catering is probably involved for many flights but he apparently works the galley hard, he told me once he made pizza for the pax from ingredients he'd stocked (raw dough, cheese, vegetables, sauce). Apparently they liked it, he's still there. I told him he should bake a lasagna.