Zucchini and Onion Frittata - Appetito

Ingredients

• 12 eggs
• Kosher salt and black pepper
• 2 Tbsp olive oil
• 1 small red onion, julienned (1⁄4 cup)
• 1 zucchini, cut into 1⁄4-inch-thick slices
• 4 slices provolone
• 2 Tbsp grated Parmesan, for garnish
• Preheat oven to 400°F.