Creamy Roasted Cauliflower Chowder

Name: Creamy Roasted Cauliflower Chowder
Ingredients: 1 large head cauliflower (cored and roughly chopped); 3 garlic cloves; 1 tablespoon extra-virgin olive oil; Kosher salt and freshly ground; black pepper; 2 tablespoons unsalted butter; 1 medium yellow onion (chopped); 2 medium carrots (chopped); 2 celery stalks (chopped); 1 dried bay leaf; ½ teaspoon dried thyme; ¼ cup all-purpose flour (you can use gluten-free flour); 3½ cups vegetable broth; 1¼ cups milk; ½ cup shredded cheddar cheese (we prefer white cheddar)