Creamy Roasted Cauliflower Soup

Name: Creamy Roasted Cauliflower Soup
Ingredients: 1 nice size head cauliflower, broken into 1 to 2 inch florets; 1/4 cup extra virgin olive oil plus 2 more tablespoons; Salt and pepper for seasoning the cauliflower; 6 whole cloves garlic, skins left on; 1 medium leek, cleaned and diced; 2 tablespoons butter; 6 cups chicken or vegetable broth; 1/2 cup half and half; 2 cups cups shredded cheese ( I used 1 1/2 cups Kasseri and 1/2 cup Parmesan but use whatever you like....Fontina, Jack Cheddar etc.); Croutons and parsley for garnish