Lazy chicken soup because I have a cold

Inspired by a discussion with nico_wolfwood on Facebook. The advantage over using easier stuff like tinned soup/stock is that there's less artificial crap, which I try and avoid when I'm feeling particularly low (yes, I could make my own stock, see "lazy").

Simmer for about half an hour:
A tablespoon of miso paste
half a saucepan-ish of water
parsley
1 cup? chopped vegetables (carrot, spinach, pumpkin, celery(*), whatever you have to hand that's soupish)
A chopped chicken thigh with as much fat cut out as you can manage
salt and pepper
2 cloves garlic
Onion would probably be good, but I don't have any.

Pour over cooked soba or other noodles.

(*)celery leaves are fantastic in soups and stocks, I always save and freeze them