Notes: We both thought this was really good. We substituted the veggie sausage for the veggie burgers and used another type of pizza crusts. I’d ignore the amounts listed below and just chop up what seems appropriate for whatever/however many crusts you’re using.

Ingredients:
2 Kabuli crusts
1 jar pizza sauce
8 ounces frozen spinach, thawed, rinsed, and drained
8 ounces mushrooms, sliced
1 onion, sliced thinly
2 cloves garlic, minced
2 red bell peppers, sliced
2 veggie burger patties thawed and chopped vegan sausage cooked & crumbled
½ cup olives, sliced
4 roma tomatoes, sliced
4 tablespoons nutritional yeast

Instructions:
Preheat oven to 425 degrees.
Generously spread sauce on the crusts.
Cover with a generous amount of spinach and top with the vegetables and chopped burger patties.
Cook on sprayed baking sheet or pizza stone for 15 to 20 minutes.
Sprinkle pizzas with nutritional yeast before serving.

Source: Engine2