Toss the mushrooms with the olive oil and Italian seasoning, and set aside to marinate for at least 15 minutes. Squeeze as much liquid as possible from the spinach and set the spinach aside as well.

Pre-heat the oven to 450°F.

Grease the inside of a 9-inch cake pan with olive oil, or use a pan with a non-stick surface. Roll or stretch the pizza dough out into a circle that is 11 inches in diameter and transfer it to the pan, pressing the crust up the sides of the pan.

Fill the inside of the pizza crust with the sauce and top with half of the mozzarella cheese. Layer half of the spinach and mushrooms over the cheese. Repeat with another layer of cheese and another layer of spinach and mushrooms. Tear the prosciutto up into pieces and scatter the pieces on top of the pizza. Transfer the pan to the oven.

Bake at 450°F for 30 to 35 minutes, until the crust is brown and the cheese has melted.

Serve with a nice salad and a glass of red wine!