Mini Frittatas with Leeks and Asparagus - Ellie Krieger

Ingredients

• Cooking spray
• 1 tablespoon olive oil
• 1 medium leek, white part only, chopped (2 cups)
• 1 bunch asparagus (1 pound), sliced on the bias into ½-inch pieces (2 cups)
• 6 medium white button mushrooms, sliced (4 ounces)
• 7 large eggs
• ¼ cup 1% low-fat milk
• ¼ cup grated Parmesan cheese
• ½ teaspoon salt
• 1/8 teaspoon freshly ground black pepper