How to make Pizza inn salad dressing receipe?

Pizza Inn's. Miracle Whip dash garlic powder, black olive juice and celery seed. I used to work for Pizza Inn when I was just out of high school. and made this Pizza inn House dressing. We also added parsley flakes. I don't know exact amounts though. Main part was miracle whip and black olive juice. From Ed: I too worked for Pizza Inn (in Dallas in the early 70's) ... I remember having to add some fennel seed as well. The dressing was good stuff, especially on sub Sandwiches. The recipe was created by Pizza Inn founder's (Joe Spillman's) mother. The black olive juice was used to cut/thin down all of the dressings - thousand island, and whatever else we had back then.