Grilled Peach and Bacon Pizza

prepared flat breads (I used naan; you could also use my 10 Minute Pizza Dough Recipe)

whole milk mozzarella, shredded or sliced

small to medium ripe peach, halved, peeled, and thinly sliced

pieces thick sliced bacon, cooked and crumbled

red onion, very thinly sliced

brown sugar