Preheat your oven to 375°F (190°C).
In a bowl, whisk together the eggs, milk, and Italian seasoning. Season with salt and pepper to taste.
Sprinkle half of the diced mozzarella over the bottom of the pie crust.
Place a layer of sliced tomatoes and chopped basil over the mozzarella.
Pour the egg and milk mixture over the ingredients in the pie crust.
Top with the remaining mozzarella and a few slices of tomato, and sprinkle Parmesan cheese over the surface.
Bake in the preheated oven for 30-35 minutes or until the quiche is set and the crust is golden brown.
Allow it to cool before slicing. Enjoy!