Broccoli and Cheese Soup

In a bowl combine the butter and flour and blend together until smooth, set aside. In a soup pot, mix together the broth, broccoli, onion and black pepper and bring to a boil. Reduce heat to low, cover and simmer for 30 mins or until the broccoli is very soft and tender. Stir in the butter mixture until the soup is thickened, then slowly stir in the heavy cream, mixing well (I use a whisk) Add the cheddar cheese, one cup at a time, mixing well after each until the cheese is melted. Serve immediately. Note: this must be kept on low heat or the cream will separate. gently simmer on low heat.