Place pumpkin, butternut and potato in a large saucepan and pour in the water and KNORR Chicken a'la King Dry Cook-in-Sauce sachet contents.
Bring to the boil then reduce the heat and simmer for 30 min or until soft.
Remove from the heat and drain, reserving the liquid.
Roughly mash the pumpkin, butternut and potatoes with a fork, return to the pan with the reserved liquid and add the beans.
Heat the oil in a small frying pan.
Add onion, garlic and celery and fry for 2 min.
Add to the soup with the sage and pepper and heat through.
Serve hot with crusty bread.