Paul says: "This is a lovely way to eat fresh fish... Fish can be quite tricky to cook on a barbecue as it sticks really easily. So to remove any fear I'm cooking the mackerel on a foil tray. Just treat it like a frying pan. If you're feeling brave however, just brush the fish with a little oil and make sure the bars of the barbecue are really clean".
A great Christmas recipe from Paul Flynn for Lidl
Allow to rest for at least 10 minutes before carving.