If you're wondering what on earth "olive vegetables" are, it's olives and salted mustard greens cooked in vegetable oil till everything is a dark green mush. And what a marvelous mush it is!
The strong flavours from the olives and mustard greens meld together and mellow during the long hours of cooking. The taste is like olives, but better. It's more complex, more nuanced, rounder,