Baked Mackerel

6 whole mackerel fillets
1/4 cup white vinegar
3/4 cup water
1 small onion -- sliced
2 teaspoons salt
6 whole peppercorns
1 tablespoon pickling spice
dash cayenne pepper
1 whole bay leaf
6 whole cloves

Place fillets in one layer in a glass or ceramic baking dish. Heat vinegar, water, onion, herbs, and spices. Pour over fish. Allow to marinate for at least one hour. Refrigerate if marinated longer. Bake, covered, for 45 minutes at 375 degrees .

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Serving Ideas : Garnish with fresh parsley