Preheat oven to 425 degrees. Make your pizza dough.
While pizza dough is rising, cook the mushrooms. In a pan on medium heat, heat up about 2 tablespoon olive oil. Once olive oil is hot, add sliced mushrooms, and salt and pepper to taste. Cook mushrooms until they’re soft and tender, about 5-7 minutes.
Grease pizza pan with olive oil. Spread dough on to greased 15-inch pizza pan. Place it in the oven (at 425 degrees) and let it cook with no toppings for about 20 minutes. This step is necessary because if you add all the toppings to the pizza before letting it cook on its own, the pizza crust won’t be ready by the time the cheese is melted.
When the 20 minutes is up, take the pizza out of the oven and add cooked mushrooms and mozzarella cheese to it. Cook for another 5-7 minutes or until cheese is melted and dough is cooked through.
In the mean time, lightly season arugula with olive oil, lemon juice and salt.
Take pizza out of the oven and top with seasoned arugula, shaved parmesan and drizzle with truffle oil. I didn’t use a big amount of truffle oil since it is quite potent. So just use as much as you feel comfortable with.
Cut into slices and serve!