Preheat oven to 500 degrees F.
Roll out dough and brush with olive oil. Top each with two tablespoons of cheese sauce, 1/4 cup mushrooms, and 1/4 cup Mozzarella cheese.
While pizzas bake, toss lemony arugula with the last two tablespoons of olive oil, salt, and pepper.
Bake pizzas until dough is browned and cheese is melted. Top with lemony arugula and serve.