Roasted Carrot Soup w Bacon Grilled Cheese Croutons

Name: Roasted Carrot Soup w/ Bacon Grilled Cheese Croutons
Ingredients: For the soup:; 8 large carrots, tops trimmed; 1 tablespoon extra-virgin olive oil; 1 small yellow onion, chopped; 2 cloves of garlic, minced; 4 cups low sodium vegetable broth; salt and freshly ground pepper, to taste; For the croutons; 1 pound thick cut pork bacon; 6 slices of fresh part-skim mozzarella cheese; 12 slices of multigrain gluten-free bread; 1 tablespoon unsalted butter, at room temperature