To make a Giada frittata, you will need eggs, milk, parmesan cheese, salt, pepper, olive oil, and your desired filling such as ham, spinach, or tomatoes. Preheat the oven to 350 degrees Fahrenheit. In a 10-inch non-stick oven-safe skillet, heat olive oil over medium-high heat, and sauté the fillings for a few minutes. In a bowl, whisk together the eggs, milk, parmesan cheese, salt, and pepper. Pour the egg mixture over the filling in the skillet. Reduce the heat to low, cover the skillet, and cook for 8-10 minutes until the egg is set but still slightly runny on top. Transfer the skillet to the oven for about 5-7 minutes until fully set and slightly golden on top. Cut into wedges and serve.