I buy frozen sardines. The shop says these are from Cornwall. They are a largish sardine but physically pretty much like the smallish ones found in tins. Some six or seven weigh about 500 grms. I thaw them in water so that their scales are kept moist. This is important because if they are let dry on the fishes’ skin they won’t come off without tearing the skin.
I might be kidding myself but I think I have got a knack of getting these into remarkably bone free fillets with the minimal of effort and the use of scissors.
Having thawed them thoroughly I take one in the palm of my left hand, head end at my fingertips and belly facing inwards and in one stroke use the scissors to remove the tail, slit off the base of the belly with the pectoral fins and vent and proceed towards the head and in an angling of the scissors take of the head and the same time eviscerate the fish in one go. It isn’t always that simple but it seems a good knack to pursue.
I then slit open the back of the fish and remove its dorsal fin. This is an irritating bone to find when one is devouring it.
With a smallish but really sharp knife I deepen the dorsal slit to the backbone at the tail end on each side. This makes the beginning of two fillets falling off the backbone. Then grasping one of these in turn I pull it off from the rest working toward the the head end. It usually comes off clean from the gut cage bones leaving these attached to the backbone with the slime, lining and detritus of the gut cage.
Having got the fillets off, now really bone free, they are trimmed and packed in lemon juice and wheat free soya sauce.
I have a fillet each morning on a buttered slice of my own bread (very lightly toasted) with some sheep or goat cheese on top.
I shall try to show some pics to demonstrate this with the next batch I prepare.