When I started thinking about walnuts and sage, I first thought of savory breads, crackers, or shortbread cookies. I then went on to imagining grains or pastas with walnuts, sage, and cheese, maybe stuffed into winter squashes. Autumn fruits also seemed a happy complement to walnuts and sage. So then I thought, what about a flat bread or pizza with a layer of carmelized onions with sage, topped with pears, walnuts, and blue cheese? —Galettista
I made pizza dough using Jim Lahey's recipe, substituting whole wheat flour for 1/3 of the bread flour, but you can also use purchased whole wheat pizza dough. Oil a 13" x 18" rimmed baking sheet and press and stretch the dough out to fill the sheet.
Preheat oven to 500 degrees F with rack in middle of oven.
Heat 2 Tbsp. olive oil in large saute pan over medium-high heat and add onions and salt. Saute onions until golden brown and carmelized, about 30 minutes. Remove from heat and add balsamic vinegar and fresh sage.
Spread carmelized onions evenly over the dough, then top with pears, walnuts, and blue cheese. Bake in preheated oven for 20-25 minutes.