No need to preheat oven.
Place chicken fillets into the roasting bag with the onion wedges and sliced peppers and season with dry KNORR mixture. Close at end with blue tie supplied.
Very gently massage KNORR mixture into the chicken on a stable surface. Ensure dry mixture is spread evenly.
Place bag sideways in a cool oven dish, ensuring pieces 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.
Serve with rice or mash potato.