Hi. I would be inclined to dig up the patch, get some 2x4s to make a raised bed, fill with good soil and compost, get down your garden centre and buy some potted cabbages, onion sets, challot sets and garlic bulbs along with seeds for some oriental greens to sow in between the rows you plant. At least these veg will agave time to overwinter. I think there are also varieties of broad bean that are hardy too, not sure myself as I'm new to this.
HTHs and anyone can correct me if I'm singing from the wrong song sheet.
By the way, what area are you growing in?