Three Cheese Salami Frittata - Recipook

Ingredients

• 16 eggs
• 0.25 cup milk
• 1 tablespoon olive oil, or as needed
• 6 1/4-inch thick slices Genoa salami
• 1 cup chopped fresh parsley, or more to taste
• 0.5 cup grated Parmesan cheese, divided
• 0.5 cup grated Romano cheese, divided
• 0.5 cup shredded mozzarella cheese, divided
• salt and ground black pepper to taste
• 1 pinch red pepper flakes, or to taste