Yup. Down here in Florida the winter IS our season to grow edibles. I'm a zone or two warmer than you, though, so don't get too excited just yet. But soon!
Cool season things like lettuce, peas and spinach can sometimes be sowed indoors (like on a windowsill) a month or so early to give you a head start on spring. Spring can be short down here in the South. I've had some hardy greens go through a mild winter even in Utah - mizuna is one and mache (aka "corn salad") is another that will take being buried in snow, even.
So you could experiment a little bit with cool season greens, just keep sowing a few seeds all the way into winter, and see what comes along. It's worth gambling a few seeds, for sure. Never know, El Nino might grace us with a cool, rainy winter that would be well suited to growing salad.
