We used to catch them out of farm ponds all the time.
Build a fire, and cook them on a stick or folded in half in pop can or a chili can.
My buddy carried a bottle of mesquite (choo choo!) smoked salt...which was good on the trout.
A friend of ours slathers them in yellow mustard before cooking.
When we catch them we just fry them on the spot. Eats em as we catches em.
Never had a fillet of trout. Prefer heads on so I can eat the cheek meat.
I must be part Eskimo too.