Combine 6 cups water, 2 cups milk and 1/4 cup margarine in a large saucepan or kettle and heat, but DO NOT BOIL. Slowly stir in entire bag of soup mix, and 2 (15 oz.) cans of tomato sauce. Reduce heat to low and simmer approx. 1 to 1 1/2 hours, stirring occasionally. Optional: For a smoother texture, puree in a blender before serving. You may also add fresh or frozen tortellini in the last 10 minutes of cooking. Can also crockpot on HIGH for 3 - 4 hours or on LOW for 6 hours.