Why didn't I think of this before? I ask myself. This is so much easier than making pizza with a pureed broccoli or cauliflower crust, and it tastes wonderful.
Preheat your broiler.
Spray a baking sheet with cooking spray.
Place 4 portabella mushrooms (wiped clean, stems removed) gill-side up on the baking sheet. Spray with cooking spray.
Cover the mushrooms with your favorite pizza toppings (see below for what I used, but you can use pizza sauce, pepperoni, turkey sausage, veggies, etc of your choice). Broil 4" from the heat for 10-12 minutes.
Note: if you prefer your veggies cooked softer, broil the mushrooms for 3-4 minutes per side before you load them with the pizza toppings.
Combine in a bowl:
1 can white beans, rinsed and drained, mashed with a potato masher
1/4 cup red wine
1/2 tsp garlic salt
1/4 tsp black pepper
1/2 onion + 1/2 red pepper + 1/2 zucchini, chopped and sauteed in a non-stick skillet until softened
1 tsp dried rosemary, basil, oregano, or the herb of your choice
Spread this mixture over the mushrooms. Sprinkle with shredded cheese (Italian blend, cheddar, mozzarella) and Parmesan. Spray with cooking spray (I use olive oil flavor).