What to do with the leftover rib rub and barbecue sauce? Here’s one idea, make a barbecued chicken pizza. California Pizza Kitchen made it famous but they aren’t the only ones who can make a tasty pizza. I had leftover flatbreads that would make a yummy pizza topped with barbecue sauce, fresh mozzarella slices, seasoned barbecue chicken, some red onion slices and cilantro thrown over the top just to make it pretty. It doesn’t matter whether you have leftovers from scratch or store bought, you can put this pizza together in no time and it will taste fantastic because you made it.