Marinated Mackerel with Dill and Horseradish Cream
This lightly pickled mackerel is “cooked” through by the acid in the vinegar. Use high-quality fish, and keep it refrigerated until you marinate it. Use a glass or ceramic baking dish as metal can interfere with the pickling process. Both Spanish and king mackerel are fished using low-impact methods, and populations in the Atlantic and the U.S. Gulf of Mexico are thriving. They reproduce in high numbers and mature quickly, so mackerel are considered safe from overfishing. Start this recipe the night before serving so the fish has time to marinate.