The big thing about this is to have a tasty stock. A dash of soy sauce or Worcester sauce also helps. I suppose it is rather risotto-ish but made with ordinary value rice which keeps the cost down.
The vegetables are more or less what's in the house really, as is whatever you use for meat. I also added some kidney beans from a batch that I'd just cooked and they made a tasty addition.
And all for under 50p a portion!