Fish 'n Kraut Sandwich

1 cup cooked, flaked Florida fish
1 tablespoon horseradish mustard
½ cup drained sauerkraut
8 slices rye bread
¼ cup chopped dill pickles
4 1-ounce slices Swiss cheese
¼ cup mayonnaise
2 tablespoons butter or margarine

Combine first 5 ingredients; mix well.
Spread ¼ of mixture on each of 4 slices of bread; cover each with cheese slice and top with remaining bread.
Melt butter in skillet. Place sandwiches in skillet and grill on both sides until golden brown.
Yield: 4 servings.