I've just harvested some rather delicious home grown celery and it's a lot less stringy than the supermarket ones and it was extremely easy to grow. I recommend you try it for next year.
I have also harvested x2 bowls full of cherry tomatoes! Waiting for them all to turn red now. Awaiting more cucumber and courgette's to harvest. So whilst I wait for them I think I may have to try making some celery soup. Anyone got any good recipes?
I think the celery recipe range from Able & Cole look worth a try.