And I admit I'm guilty of it too. I have a 3lbs bag of rice, some oatmeal, and lots of "instant" potatoes as my starches. I can't cook worth a damn.
Here is a simple recipe for
Treacle Sponge Pudding, which is very easy to follow. You can buy them in a can but making the pudding from the basic ingredients saves money and tastes better. Serve with custard. If you can make Treacle Sponge pudding then making Spotted Dick (again available in a can, which makes for excellent canned ration food) is easier to make.