Mackerel, a la Claudine Recipe ingredients

To prepare this Mackerel, a la Claudine Recipe, first take a nice large fresh mackerel, split it down back and remove bone, season fish with melted Crisco, chopped fresh mushrooms, salt, pepper, and finely chopped shallot; put on to a grill iron and cook in front or over brisk fire for about 15 minutes, then take up and serve on hot dish with the following sauce: Take 1 cup brown sauce, 2 tablespoons capers, pinch chopped parsley, four anchovies rubbed through sieve, 1 teaspoon glaze, and 1 chopped shallot, 3 or 4 shredded button mushrooms; boil up and simmer for 10 minutes, rub through sieve, then add juice of 1 lemon and 4 chopped olives, reboil and serve.