Prepare dough as needed if making homemade. Preheat oven to 400ºF and line baking pan with parchment paper. Pre-bake rolled out dough for 10 minutes if using homemade.
Start making the balsamic glaze: In a small saucepan bring vinegar and sugar to a boil; reduce to simmer and stir frequently until mixture has reduced by half. Mixture is done when glaze coats back of spoon. Remove from heat and let cool before storing in jar.
Meanwhile, heat medium skillet over medium heat and add oil to pan once hot. Add thinly sliced onions, stirring frequently until translucent and fragrant. Add thinly sliced pears to the skillet to soften just slightly – about 2 minutes.
Place onions and pear slices on flatbread, add crumbled gorgonzola and chopped walnuts. Bake pizza at 400ºF for 10 minutes. Top with arugula and finish with balsamic glaze.
Recipe and photo by Fit Mitten Kitchen.