yep there's a whole range of things you can do over the winter.
it's probably a bit late for the brassicas which will over winter because they will need to be well established before the frost sets in, having said that brassicas can be eaten before they mature in most cases. which leads me onto the next option, baby veg, you should have time to get a crop of beetroot/chard maybe carrots and tatties (as above). leeks are a good choice in the onion department and spinich is a good salad/green veg crop, but again it's a bit late for this year.
at the end of the day it's all about planning ahead and experimenting with what works for you in terms of time available, your space, environmental conditions and most importantly what you want to eat and therefore grow.

and welcome to the forum
