Source: Vintage Recipes from Old Time Pickling and Spicing Recipes - Florence Brobeck (c. 1953)
1 cp thinly sliced and chopped canned mushrooms
1/2 cp diced ripe olives
1/4 cp diced sweet pifckles
1 tbsp minced canned pimiento
1 - Combine mushrooms, olives, pickles, and pimiento.
2 - Add enough mayonnaise to moisten and hold together.
Makes about 2 cups