Hello there, I cut them in rough quarters and de stone them and then either poach them in a tiny bit of sugared water or just bake them for a bit in sugared water before putting the crumble on top and further baking.

I guess the main reason for me cutting them open is to check there is no plum moth, as although I use the hormone treatment it still gets in to the odd one, and I'm not too fond of maggots!

Other than jam, have you got any other ideas what to do with plums - do you know if you can freeze them, and whether you would need to cook them first?