Cauliflower Soup and Garlic and Cheese Sourdough Dippers

Name: Cauliflower Soup and Garlic and Cheese Sourdough Dippers
Ingredients: Coarse salt and coarse black pepper; 1 tablespoon extra-virgin olive oil; 3 tablespoons butter; 2 small heads cauliflower, or 1 large, cut into small bunches of florets; 3 ribs celery and leafy tops from the heart of stalk, finely chopped; 1 medium onion, chopped; 2 tablespoons chopped fresh thyme leaves; 2 tablespoons all-purpose flour; 1 quart chicken broth; 1 cup half-and-half or whole milk; Hot sauce, optional; 3 tablespoons chopped fresh parsley leaves or chives, for garnish; 1/2 cup grated Parmesan, for passing at the table; 3 sandwich size sourdough English muffins (recommended: Thomas' brand) split; 1 garlic clove, minced; Grated cheddar and Parmesan; Paprika