frittata recipe

Ingredients:** - 8 large eggs - 1/4 cup milk or heavy cream - Salt and pepper to taste - 1 tablespoon olive oil - 1 small onion, finely chopped - 1 bell pepper, diced - 1 cup cherry tomatoes, halved - 1 cup fresh spinach, roughly chopped - 1/2 cup shredded cheese (cheddar, feta, or your favorite) - Optional: fresh herbs (such as parsley or basil) for garnish