This isn't so much a recipe, but an idea. I thought it was yummy. I knew my mushroom haters in the family wouldn't appreciate it, so I just made it for me for lunch one day. It was quick, easy and delightful!
Use a large Portobello mushroom placed upside down for your pizza crust, top with your pizza toppings: I used pizza sauce, precooked turkey sausage, fresh grated Parmesan cheese and mozzarella cheese. Bake under a broiler until everything is warmed up and melted about 8 minutes (mine wasn't quite done but I'd already shut off the oven, so I just popped it in the microwave for another minute and it worked perfect). Then I topped with fresh chopped basil and enjoyed!