Mackerel with lemon salsa

30 minutes + marinating ■ Serves 4 ■ EASY
Sustainable mackerel is one of the easier fish to find. Look for the MSC stamp when buying.

lemon 1, halved
olive oil
garlic 1 clove, crushed
green olives a handful, pitted and quartered
parsley a handful
mackerel 4, gutted and cleaned

■ Squeeze the juice from the lemon and save it. Halve the lemon again, then scrape out and discard the flesh. If there's a thick pith on the peel, slice away half. Cut the peel into dice.
■ Heat a little oil in a pan, add the lemon and stir until it starts to caramelise around the edges. Tip into a bowl and add the garlic and olives. Add more olive oil and a little lemon juice and season. Leave to sit for 2 hours. Then stir in the parsley.
■ Cut slashes in each side of the fish and barbecue for about 4 minutes each side. Serve with the lemon salsa.

Mackerel with lemon salsa