Fast food greek chains: their recipe for "greek salad dressing" and tzaziki??

[goldendelicious]

i had a yummy tray at jimmy the greek last week and i LOVED the salad dressing they used. it's wasn't a clear vinegrette, it was white and more liquidy than the tzaziki.
anyways, it was super good! does anyone know where i can get a similar recipe?? i wouldn't mind knowing their tzaziki sauce recipe either ;P