I was going out to visit my wife at a nursing home in an hour. A lovely friend from a town an hour away arrived - at lunchtime! - and I had nothing quick to offer her. A quick check of the pantry showed several jars of preserved veges and these, with a couple of Turkish pide, became a desperate pizza...enjoyed by us both!
These veges were what I had available in my pantry. You could use almost anything you have available, consistent with your personal taste (which is why you've got what you've got, anyway!)