I also have had this recipe for ages-since I was a little girl(I started collecting early!lol). It is my very favorite vegetable dip. I always make it the day before I am serving it. I also have subbed 1/2 tsp dried parsley(crushed) and have used both minced white onion and minced green onion-either way its terrific!
This is very close to a recipe my family has been using for years. We use dried parsley, dried minced onion, and pumpernickel bread instead of the rye. Cucumbers are a great dipper, as well as pretzels. Thanks for posting!