I don't have the book but do have a few recipes for cauliflower soups. I like to add curry to mine, makes all the difference.
Enjoy!
Roasted Cauliflower Soup
2 heads cauliflower
3 garlic cloves
2 shallots
2 tablespoons olive oil
3 cups chicken broth
1 cup water
1 teaspoon finely chopped fresh thyme leaves
1 bay leaf
2 cups heavy cream
Preheat oven to 425°F.
Cut cauliflower into 1-inch flowerets (about 10 cups). In a large baking pan toss cauliflower, garlic, and shallots with oil to coat and roast in middle of oven about 30 minutes, or until golden.
In a 4-quart kettle simmer broth, water, roasted cauliflower mixture, and herbs 30 minutes, or until cauliflower is very tender. Discard bay leaf and in a blender puree soup in batches until smooth (use caution when blending hot liquids), transferring to a bowl. Return soup to kettle and stir in cream and salt and pepper to taste. Heat soup over moderate heat until just heated through.
Cauliflower Soup
2 tablespoons butter
1 large onion, finely chopped
1 pound cauliflower florets (about 5 cups)
2 14 1/2-ounce cans low-salt chicken broth
1 tablespoon thinly sliced chives
Melt butter in heavy large pot over medium heat. Add onion and sauté until tender, about 8 minutes. Add cauliflower and sauté 2 minutes. Add broth. Cover and simmer until cauliflower is tender, about 25 minutes.
Working in batches, transfer soup to blender and purée until smooth. Return soup to pot. (Soup can be prepared 1 day ahead. Cool slightly. Cover and refrigerate.) Bring soup to simmer. Add the chives just before serving.
