Preheat oven 400 degrees F. Lightly oil a casserole dish and set aside.
Wash and steam cauliflower florets for 5 minutes or until florets are tender. Reserve a cup of steam cauliflower to blend with the cashew cheese sauce. Place remaining florets in a casserole dish and set aside.
Rinse and drain cashews. Place cashews in a high-speed blender with water, nutritional yeast flakes, red bell pepper, onion, garlic, tahini, salt and cayenne pepper,
Process until smooth and creamy. Add the cup of cauliflower florets and blend, scraping down the sides of blender with a spatula. You may need to add extra water.
Pour sauce over cauliflower florets. Sprinkle top with paprika. Bake for 35 minutes or until edges are slightly brown.
Remove from oven and allow to cool slightly, garnish with parsley and serve.