Stretch 1/4 pound fresh pizza dough into a 6-8 inch circle. On one half of the dough, spread to within 1/2 inch of the edge 1/2 cup pizza or marinara sauce, 1/4 cup sliced mushrooms, and 1/2 cup frozen spinach, defrosted and with the moisture squeezed out. Mix 1/4 cup part skim ricotta cheese with 2 T. of part skim mozzarella cheese. Dot the top of the spinach with the cheese mixture. Fold dough over to enclose filling and crimp edges. Spray a baking sheet with vegetable oil spray or line with parchment paper and sprinkle on cornmeal. Bake calzone in 400 degree preheated oven for 20-30 minutes until golden brown.