Clean the mackerel by removing the head, spine and insides. Wash them in cold water and dry them on some kitchen roll. Open and lay flat on a chopping board with the skin down.
To prepare the stuffing, in a large bowl, mix the Feta cheese, double cream, breadcrumbs, eggs, parsley, chives, capers and garlic until you create a smooth paste. Season with salt and pepper.
Spread a couple of tablespoon of the mixture on the flat mackerel and then cover with another sardine creating a stuffed fish sandwich affect.
Once ready brush them with olive oil and cook under a hot grill for approx. 7-8 minutes on each side.
Serve immediately on a bed of sliced tomato salad dressed with extra virgin olive oil and salt and pepper.
