Marinated Mackerel with Mustard Sauce
Peel onion and cut into rings. Cut each mackerel into 4 pieces. Bring water, bay leaves, juniper berries, sugar, salt to taste and plenty of pepper to a boil. Add lemon juice, lemon slices and onion rings. Set aside. Place mackerel in the hot broth and marinate 4 -5 hours.
For the mustard sauce, mix mustard with mayonnaise and chopped olives. Serve sauce with drained fish. Serve fresh tomatoes on the side, if desired.