Cover with coarse salt a non stick grill pan, heat it for a few minutes and then lay over the mackerels, skin side down.

Cook the mackerels for about five minutes on medium heat, then gently turn them and finish to cook the fish on the other side, just a few more minutes.

The cooking time will change significantly depending on the size of the fish, so check them constantly: you won't want a raw or dry fish.

Move the mackerels from the grill pan onto a dish, remove bones, skin and excess salt and serve the fillets with a drizzle of extra virgin olive oil.