Delicatessen preserves Mackerel Fillets in Olive Oil Herpac 51079 From €3.80 Mackerel fillets that have been carefully selected. They come from traditional fishing, filleted by hand and packed in olive oil. An authentic pleasure of the sea. You can enjoy them in their oil, with mayonnaise or with a tomato, pepper, onion, cucumber and vinegar dressing. Prepared for you, don't miss it! Add to cart