Very similar to the spotted dick recipe, just add plenty and I mean plenty of jam.
Serve with hot custard.
Have ready a 24cm steamer filled with boiling water. This is very important, as soon as the pastry is ready it must be cooked or you will end up with a heavy leaded end product.
If you have any left over, wrap in cling film and chill. When needed slice cold and warm in the microwave, take care though, as the jam will burn.