Mackerel is fish with a high level of Omega 3 fatty acids, which are so-called heart healthy fats.
 
The Smoked Peppered  Mackerel Fillets would be great as an appetizer, the peppers already add a lot of flavor to the fish. If you want to eat it warm, just wrap the fish in aluminum foil, and put it in the oven for approximately 10 minutes or so.