• Make-Ahead

Ingredients

1. 10 large eggs
2. 1/4 cup milk
3. 2 tablespoons freshly grated Parmigiano-Reggiano cheese
4. 2 tablespoons chopped parsley
5. 2 tablespoons chopped basil
6. 3/4 teaspoon salt
7. 1/2 teaspoon freshly ground pepper
8. 3 tablespoons extra-virgin olive oil
9. 2 medium shallots, thinly sliced
10. 1 medium tomato, cut into 1/2-inch dice
11. 4 thin slices of prosciutto, cut into 1/4-inch strips
12. 4 ounces fresh mozzarella, cut into 1-inch cubes

Directions

1. Preheat the oven to 350°. In a large bowl, beat the eggs. Beat in the milk, grated Parmigiano-Reggiano cheese, parsley and basil. Season with salt and pepper.
2. In an 8-inch nonstick ovenproof skillet, heat the olive oil. Add the shallots and cook over moderate heat until softened, about 7 minutes. Add the tomato and prosciutto and cook, stirring, until warm, about 2 minutes. Pour in the eggs and cook until beginning to set on the bottom, about 3 minutes. Poke the mozzarella cubes into the eggs. Transfer the skillet to the oven and bake the frittata for about 20 minutes, until just firm when lightly pressed.
3. Set the skillet over high heat and shake the frittata until it releases, about 10 seconds. Place a large, flat plate over the skillet and carefully invert the frittata onto it. Let cool for 5 minutes, then cut into wedges and serve.