Creamy Crock Pot Cauliflower Potato Soup Recipe

heads of cauliflower (about 1-1/4 pounds each), trimmed and cut into 1-inch pieces (substitute 2 pounds frozen cauliflower if you prefer)

medium potatoes, peeled and cut into 1-inch chunks

olive oil

garlic cloves, peeled

chicken or vegetable broth

water

Salt and freshly ground pepper

Freshly grated Parmesan cheese for serving (optional)