Damson and chocolate steamed pudding

Here's a recipe for those of you who own a microwave:

2/3 cup brown sugar (muscavado or soft brown)
2 eggs
100g melted butter
3/4 cup self raising flour
1/4 cup milk
3 tablespoon damson jam and a few chopped plums
1/4 cup good quality cocoa powder

Mix together sugar, flour, cocoa, eggs and milk. Add melted butter. Put jam and chopped plums in the bottom of a microwave proof jug, pour mixture in on top. Cook, covered with a plate, in the microwave on high for 4 minutes. Let it stand for a minute, then cook for a further 4 minutes.

Serve with plain yoghurt.,