Beautiful pictures. Thanks for sharing them. You have really done great this year. If your weather is like ours where you actually get a warm up after the first couple of frosts or so, I’d say you could Plant some stuff.
Winter wheat can be used, and it has to be planted after frost, so that the Hessian Fly is dead. Some people in your area grow garden stuff in “hot beds”. These are beds that have a big manure base for heat. Other wise they are the same as a cold frame.
The winter cover crops in general just go dormant when a freeze comes, and when it warms up enough they start growing again. It’s too late for fava beans.
You could try winter wheat, vetch, rye, and/or alfalfa. Vetch is good to plant where you had cukes, melons etc. If you plant winter wheat, in the early spring you can interseed with red clover. Rye should be winter cereal rye.
Thanks. I just started reading about cover crops and their benefit this year. Figured I might be too late to start.