Place herring pieces, potato, onion, pickle, apple and mayonnaise in a bowl and mix to combine. Add mayonnaise and mix well. Season to taste with salt and pepper.
Spread about 1 teaspoon of butter on each bread half. Top with a lettuce leaf, then with the herring mixture.
Tools You May Need
c.1998, M.S. Milliken & S. Feniger, all rights reserved
Tools You May Need
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