Garden Frittata Italiano

INGREDIENTS

• 2 tablespoons olive oil
• 1 lb mushroom, sliced
• 1 large onion, chopped
• 3 garlic cloves, minced
• 1 lb fresh spinach, chopped
• 1 lb roma tomato, chopped and seeded
• 1/4 cup fresh basil, chopped
• 1/4 cup fresh parsley, chopped
• 2 teaspoons ground oregano
• 2 teaspoons ground black pepper
• 1 teaspoon salt
• 1 teaspoon red pepper flakes
• 12 eggs
• 1 1/2 cups milk
• 2 cups sharp cheddar cheese