Roasted Garlic and Cauliflower Soup

Ingredients

• 1 medium head garlic whole and unpeeled
• 1 large head cauliflower, cut into florets
• Olive oil
• Kosher salt and ground black pepper
• 1 cup peeled and diced russet potato about a potato
• 2 tablespoons unsalted butter
• medium yellow onion, diced
• 1 teaspoon fresh thyme leaves
• 5 to 6 cups vegetable broth plus more as needed
• cup heavy cream or halfandhalf plus more to taste
• Freshly shredded white cheddar cheese for garnish, optional
• Your favorite bread for serving, optional