hi! :)
I am new to this forum (this is my first post!) but now so new to veg gardening.
Whenever i get all these ideas about growing veg i remember soome of the best advice i have ever had....only grow things you like to eat!
For me this time of year i am about to grow alot of oriental veg and salad leaves, a favorite of mine is Pak Choi (green revolution), Mizuna, Chinese leaf, Chinese Cabbage, Pe tsoi. Winter leuttice, Radishes. You can even plant some dwarf french beans, I get given plenty of Italian Chard seeds (which i can post to you if you want to try it) they can be planted from march to the end of october and are great as a robust staple green (as long as you like chard!).
The japanese onion sets can start to be put down in about 4-6 weeks time, as can early garlic, or you can wait until winter is kicking in (mid November to December is probably best).
I would go to
http://www.realseeds.co.uk to buy your seeds and take a look there as they have excellent grow advice, times to sow etc with every seed description, plus they offer good old fashioned and hardy strains, none of those artificially bred F1 strains that can be pigs to grow, plus they give you ALOT more seed much cheaper than those big companies.
Sorry about the ramble, growing veg gets me excited! hehe
Good luck!