In a stand mixer, combine the instant yeast, sugar, water, and salt. Allow to rest until the yeast begins to foam.
Add the olive oil and bread flour to the bowl and turn the dough hook on low
Knead the dough for 8-10 minutes, or until all the flour is mixed in to the dough and a dough ball is formed.
Either cover and allow the dough to rise for 2 hours or cover and refrigerate for up to 12 hours. (If refrigerating the dough prior to baking, remove from the refrigerator 1 hour prior to shaping.)
Garlic Butter Sauce
In a small saucepan, melt the butter over medium heat.
Add the garlic and sauté for one minute.
Turn off the heat and add the parsley. Stir and set aside.
Preparing the Pizza
Preheat the oven to 425℉.
Lightly dust a work surface and stretch the dough to a 16-18 inch circle. You will want this pizza to have a thin crust. You may use a rolling pin to ensure that the dough is evenly spread and thin.
Place the dough onto a lightly floured pizza pan.
Using a pastry brush, brush the entire pizza with the garlic butter sauce.
Next, sprinkle the mozzarella and parmesan over the entire pizza dough. Reserve 1/4 cup of cheese to sprinkle on top of all of the ingredients before baking.
Place the spinach evenly over the cheese.
Finally, evenly distribute the mushrooms on top. Sprinkle the last bit of cheese over the mushrooms.
Bake the pizza for 15 minutes, or until the crust is golden brown and the cheese is hot and melted.
Remove the pizza from the oven and allow to cool for 5 minutes before slicing.