Wash and dry the mackerel fillets.
To make the marinade, add garlic and ginger in a pestle and mortar and grind until pureed.
Fry the dried spices over a low heat until you can smell them.
Add these to your pestle with lemon juice and mix.
Brush the marinade all over the fillets and leave to marinate for at least half an hour.
Pre-heat your grill
Place foil onto the tray and add the fish.
Cook under a hot grill for approx 3 mins each side.
Serve with salad, noodles, rice anything!