Broccoli Cheddar Soup

Name: Broccoli Cheddar Soup
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Yield: 6
Ingredients: Ingredients; 4 tablespoons butter; 1 medium onion, diced; 2 carrots, diced; 2 celery stalks, diced; 3 cloves garlic, minced; 1/4 cup all-purpose flour; 3 cups chicken or vegetable broth; 2 cups whole milk; 1 cup heavy cream; 1 large head broccoli, cut into bite-sized florets (about 4 cups); 2 cups sharp cheddar cheese, freshly grated; 1/2 cup Parmesan cheese, grated; 1 teaspoon Dijon mustard; 1/2 teaspoon paprika; 1/4 teaspoon nutmeg; Salt and black pepper to taste; 2 tablespoons fresh chives, chopped (for garnish)