Cheryl's Broccoli Cheese Soup (serves 8)

While broccoli soup base is cooking melt margarine in a medium sized pan. Add flour to make a roux. Cook and stir until mixture sticks together. Add small amount of half & half and stir until blended. Add the remaining half & half and stir until smooth. Add Velveeta. Stir until cheese is melted. Add the cheese mixture to the broccoli soup base and stir. Cook until heated thoroughly.