Preheat oven to 375 degrees.
Thinly slice your washed and dried spinach. See the picture to see how thin.
Slice your mushrooms about as thick as the pre-sliced ones you can get at the store after you have cleaned them off with a slightly damp cloth or paper towel.
Spread pizza sauce evenly over each of your flatbreads or pita breads.
Top generously with your spinach. See the picture. If you want to really taste your spinach, you have to put it on thick because it will cook down quite a bit.
Now cover the spinach with a generous amount of sliced mushrooms.
Sprinkle with minced garlic, if using.
Top with mozzarella cheese.
Sprinkle with Parmesan cheese.
Sprinkle with granulated garlic, if desired and you didn't use minced garlic.
Bake in oven for 5-10 minutes, or until your cheese is melted and your toppings are heated well. It really depends on your oven, how many pizzas you are making, and how high you topped them. My two pans of pizzas took 11 minutes today.