Place the pumpernickel in the raclette pans and toast under a raclette grill for approx. 4 mins. Dot the cheese on top and melt under the raclette grill for approx. 5 mins.
Cook the plums with all the ingredients up to and including salt over a medium heat for approx. 20 mins. until soft, stirring occasionally; leave to cool. Spoon over the melted cheese.
Bring the port with the water and all the ingredients up to and including grapefruit peel to the boil. Add the pears, reduce the heat, cover and simmer for approx. 10 mins. until almost soft. Remove the pears, reduce the juice for approx. 30 mins. to a syrupy consistency. Drizzle over the pears. Serve the pears warm with the raclette.