1 lb skinned fillets of mackerel 7 limes 2 tomatoes 4 chiles serranos 1/4 c olive oil 1/2 ts oregano
Instructions
Pepper Cut fish into small cubes, about 1/2 inch, and cover them with the lime juice. Set in the bottom of the refrigerator for at least five hours, or until the fish loses its transparent look and becomes opaque. Stir from time to time.