Ladbrokes, I cannot imagine being in such a dire situation, and hope you are not. Or maybe your question is really "what is your favourite vegetable?"! in which case, all kinds of salad leaves…. and they repay the compost with so many meals.
you are right, it is indeed extremely precious, so in terms of value I think it still depends what you most like to eat and want to boost the yield and quality of – lettuce, tomatoes, spinach and chard, climbing beans, carrots, potatoes, leeks… what do others think?
For me it’s a tie between ps broccoli and climbing beans. The taste and yield of these, more than other crops, has improved quite dramatically since I started feeding the soil 3 years ago.
For me it is the soil not the crops. I would put the compost on the beds which have had less before so that all the soil is in good heart and then everything is possible for any crops – so long as they are likely to grow in this area!