Roasted Garlic Soup with bread

1 head cauliflower 1 large head of garlic 1/2 tablespoon olive oil 1 tablespoon butter 1 1/2 stalks celery , diced 1 yellow onion , diced 1 carrot , diced 1/2[...]

3 -5 whole garlic heads , unpeeled 3 1/2 tablespoons olive oil , divided 1 1/4 teaspoons salt , divided 1 teaspoon fresh ground black pepper , divided crushed[...]