Pear & Onion Flatbread

Ingredients

• 1 tsp quick-rise instant yeast
• 1 cup lukewarm water
• 11/2 cups all-purpose flour
• 1/2 cup whole wheat flour
• 1 tsp granulated sugar
• 1 tsp table salt
• 1/2 cup chopped toasted nuts—pecans, walnuts or pistachios (if using pistachios, no need to toast or chop)
• 4 Tbsp vegetable or olive oil, divided, plus more to brush the dough
• 2 red onions, thinly sliced
• Kosher salt
• 1 Tbsp honey
• 2 Tbsp red wine vinegar, divided
• 2 firm but ripe pears, cored and sliced about ½ inch thick (no need to remove the skin)
• 1/2 cup goat cheese, about 5 oz, room temperature
• 3/4 tsp crushed red pepper flakes
• 1 cup grated Gruyère cheese, about 3 oz
• 3 cups arugula, about 3 oz