Pear and Prosciutto Grilled Pizza

Ingredients

• 2 Bartlett or Bosc pears (sliced 1/4-inch (1/2-cm) thick, core removed)
• 1/2 small red onion (cut into rounds)
• 1 tbsp olive oil
• 2 tbsp all-purpose flour
• 1 lb pizza dough
• 1/4 cup prepared pesto
• 2 slices prociutto (cut into thin strips)
• 3 oz goat cheese or gorgonzola (crumbled)
• 1/2 cup arugula leaves (lightly packed)