Roasted Potato and Onion Pizza

INGREDIENTS

• 2 tablespoons butter
• 2 tablespoons olive oil
• 1 large onion, sliced lengthwise into thin ribbons (about 4 packed cups)
• 1/2 teaspoon minced garlic
• 6 cloves whole garlic, roasted
• 1 teaspoon salt
• 1/4 teaspoon ground white pepper
• 1 quantity pizza dough
• 1 cup Fontina Cheese, shredded
• 10 small fingerling potatoes, thinly sliced and roasted
• 3 sprigs fresh thyme