Oven-Roasted Cauliflower, along with Mushrooms, Garlic and Walnuts combine with sautéed onions, celery and carrot; herbs, vegetable stock, vermouth and cream for an incredibly flavorful as well as hearty soup that's perfect for cold weather and for Meatless Monday.   I really love the nutty flavor of roasted cauliflower, so when I decided to make a