In a medium pot, steam the cauliflower for 10 minutes, or until the cauliflower is tender.
Put the cauliflower in a vitamix or blender, add the heavy cream, salt and pepper. Blend until silky smooth. Taste, and add more seasonings if necessary.
Cook your pasta, reserving 2 cups of pasta water.
To serve, mix the pasta, sauce, and some pasta water. Serve in bowls and top with parmesan cheese.