1 to 1 1/4 cups mayonnaise
2 1/2 tablespoons finely chopped sweet pickle (about 1 large)
1 tablespoon snipped fresh parsley
1 1/2 tablespoons chopped onion OR 1 teaspoon instant minced onion
1 teaspoon prepared mustard
In medium bowl, stir together all ingredients until well combined. Cover and refrigerate if not using immediately.
Makes about 1 1/2 cups.