Broccoli Cheddar Soup

In a large pot over medium heat, melt butter. Add onion and celery and cook until soft, 5 minutes. Whisk in flour and let cook 1 minute. Slowly add chicken broth and season with salt and pepper. Stir in broccoli and carrots. Bring to a boil and reduce heat to low. Let simmer until vegetables are tender, 20 minutes. Slowly add milk and bring to a simmer, then stir in cheddar. Season with salt and pepper and top with more cheddar. Serve with baguette.