No need to preheat oven.
Place sweet potatoes and cream into the roasting bag and season with dry KNORR mixture.
Very gently massage KNORR mixture into potatoes on a stable surface. Ensure dry mixture is spread evenly and close bag at end with blue tie supplied.
Place bag sideways in a cool oven dish, ensuring potatoes are evenly spaced.
Bake at 180°C for 50 minutes on the lowest shelf in the oven. Ensure that the grill is off at all times. Keep enough room for the bag to expand (bag must not touch the sides of the oven).
Cut the bag open and transfer to a serving dish with any sauce that is in the bag.