If cheese and sauce are included in this one topping pizza then I'll probably go with one of the sausages, most common kinds are equally great to me.

Though the part I find most enjoyable when eating a full topping pizza is the olives but an olive only pizza doesn't sound very appetizing. Or maybe it would be, I've never tried but if they were cut finely and only some of them were pickled or whatever makes them saltier then it might work.