Wash and halve plums.
Place plums and water into a 3-litre casserole dish.
Cover, cook for 5-7 minutes on HIGH.
Add sugar and cook a further 15-20 minutes on HIGH, uncovered.
Stir every 3-4 minutes during cooking.
Add pectin and cook a further 3-5 minutes on HIGH.
Pour into sterilised jars and seal.