Mini Vegetable Frittata

Ingredients (9)

• 0.25 cup olive oil
• 1 pints shiitake mushrooms stemmed and cut into very thin slices
• 1 large zucchini diced
• 8 basil leaves hand torn
• 4 large eggs beaten until foamy
• 2 small leeks white and light green parts rinsed and finely chopped
• 1 nonstick cooking spray
• 1 medium yellow onion cut into very thin slices
• 0.25 cup grated pecorino romano cheese