Walnut Pepper Mayonnaise Sauce

Mix together 1 cup mayonnaise with ½-cup chopped walnuts, ¼-cup finely chopped red bell pepper (or pimento from a jar), 1 tablespoon chopped parsley, 1 tablespoon chopped cilantro, and 2 teaspoons lemon juice. Add salt and pepper to taste. Combine well and refrigerate.