Cooking Fresh Mackerel on a Beach Barbecue

Fresh from the Harbour: Choosing Your Mackerel

There are few better meals than a mackerel that was swimming that morning, cooked within sight of the water it came from. If you are buying from a harbour stall or a fishmonger near the quay, look for fish with stiff bodies, bright eyes and a clean, sea-sweet smell. The skin should be glossy, with those dark tiger stripes standing out sharply against the silver. Anything limp, dull or smelling faintly of ammonia has been sitting too long.

Ask the seller to gut and head the fish for you if you can. It saves a messy job on a windy beach, and it means you can get the coals lit sooner. A whole mackerel weighing around 350–450g is ideal for one person; two smaller ones work just as well and cook a little faster.

Once you have them, rinse the cavities, pat them dry with kitchen paper, and make two or three shallow diagonal cuts along each flank. This lets the marinade reach the flesh and helps the thicker parts cook evenly. Keep the fish in a sealed tub in a cool bag until you are ready to cook, and never leave it sitting in direct sun.

A Simple Lemon and Herb Marinade

Mackerel is an oily fish, rich and full-flavoured, so it needs only a bright, sharp marinade to lift it. Creamy or heavy sauces overwhelm it. This is the mix I take to the beach in a jam jar:

• The zest and juice of one unwaxed lemon
• Four tablespoons of good olive oil
• A generous handful of flat-leaf parsley, chopped
• A few sprigs of dill or fennel fronds, roughly torn
• Two garlic cloves, crushed
• A teaspoon of Dijon mustard
• Plenty of cracked black pepper and a small pinch of sea salt

Shake it all together and pour it over the scored fish in a shallow dish or a lidded tub. Thirty to sixty minutes is plenty. Leave it much longer than that and the lemon juice starts to cure the flesh, turning it opaque and slightly chalky before it ever meets the heat. Turn the fish once, halfway through.

Setting Up Safely by the Shore

A portable barbecue, either charcoal or gas, gives you far more control than a disposable tray and produces less waste. Check local rules before you pack it: many councils and coastal sites restrict or ban barbecues on certain beaches during the summer months, and some harbours have bylaws about open fires. A quick look at signage at the car park or a word with the harbourmaster will keep you on the right side of things.

Choose your spot with care. Set up on shingle, bare stone or a designated barbecue stand, well away from dry grass, marram grass, dunes and anything else that burns. Never bury a hot tray in the sand; it can scorch the surface and leave glassy scars. Be wary of pebbles too, as some stones crack and spit when heated. Use a level base, a windbreak if it is breezy, and keep a bottle of water and a bucket of damp sand within reach.

Finally, know your tide. The best spot at four o'clock can be underwater by six. Pitch yourself well above the high-water mark and keep an eye on the sea.

Cooking Over the Coals

If you are using charcoal, give it twenty to twenty-five minutes to settle. You want an even bed of grey-white coals with a steady glow, not leaping flames. Oil the grill bars so the skin does not tear.

Lay the mackerel on, skin side down first, and then leave it alone. Resist the urge to poke and prod. After four to five minutes, the skin should be blistered and crisp, and the fish should lift cleanly when you slide a thin spatula underneath. Turn once and cook for a further three to four minutes.

It is done when the flesh near the backbone is opaque and flakes away in soft, moist curls. If you have a small knife, slide it in at the thickest point: it should meet no resistance. Overcooked mackerel turns dry and grainy, so err on the side of pulling it off early. Finish with a final squeeze of lemon and eat it straight from the foil with your fingers.

The Walk That Earns It

Half the pleasure of a beach barbecue is arriving at it hungry. Park in the harbour town, wander past the chandlery and the slipway, and take the coast path out along the headland. An hour or two of cliff steps, gorse and the low thrum of a foghorn builds a proper appetite, and you will come back to your coals with a keener eye for the view.

Take a tide table and a map, wear boots that can handle mud and shingle, and allow time to get back before the light goes. If the wind is up, walk out and back rather than looping inland where paths can be faint. A flask of tea in the rucksack never goes amiss.

Leaving Nothing Behind

Let the coals cool completely before you touch them, which may take an hour or more. Once cold, tip the ash into a bag or tub and take it home. Do not bury ashes in the sand or scatter them in the dunes, where they can harm plants and leave ugly grey patches for the next visitor. Cooled charcoal ash can go on a garden border or into your household bin.

Wipe down the grill, bag every scrap of packaging, lemon half and foil, and carry it back to the nearest bin or the car. Leave the spot looking as though no one had ever been there, and the beach will keep serving up evenings like this for years to come.