The cheapest miracle in the sea.
Sustainable, oily, cheap, and packed with the good fats. Mackerel is a masterclass in why fresh matters — a mackerel eaten within 12 hours of leaving the water is a different fish from one that's been on a shelf for three days. Learn to spot the fresh ones, learn to fillet them, and dinner sorts itself twice a week.
A proper fishmonger, or straight off a boat at Newhaven, Peterhead or any Scottish harbour on a summer evening.