Cream of Broccoli Soup - Food Gardening Network

Ingredients

• 5 tablespoons butter, divided
• 1 onion, chopped
• 1 stalk celery, chopped
• 3 cups chicken or vegetable broth
• 8 cups broccoli florets
• 3 tablespoons all-purpose flour
• 2 cups milk
• Ground black pepper to taste