In the comment section of my post about protecting your plants from frost, Doccat5 shared a great tip for ripening your green tomatoes indoors. She writes:
"If your tomatoes are about done in, you can pick all the green ones, store them between layers of black and white newspaper (make that a layer of about 3 sheets) in a cardboard box. Store in a cool, dry place and check regularly. You will have fresh ripe tomatoes well into winter. Got this trick from Mother Earth over 20 years ago and it works wonderfully. Besides it's a hoot to take a plate of sliced home grown tomatoes to a pot luck in the middle of January! It does raise some eyebrows."
This is a great tip, and it is definitely wonderful having fresh, garden-grown tomatoes even in winter!