Clean and scale the fish, but leave the liver inside - it is a delicacy. Prick each one with a needle in a few places.
Beat the olive oil with the garlic, parsley and salt and pepper and marinate the fish for 1 hour or longer. If using vine leaves preserved in brine, soak them in a few changes of water for 1 hour. Fresh leaves can be used as they are.
Wrap each fish in 2 vine le