What can I do with under-ripe eggplant? The eggplant in my garden was doing very well up until a hard frost a couple of days ago (it's late December, and this was inevitable). Some of the plants died and I picked the eggplant.

I have several variety of eggplant, but they are all rather hard. Will they ripen indoors? And, would it be possible for me to use them in eggplant parmesan before they are fully ripe?
let them sit in a sunny window with southern exposure until they get a little soft. Then put them in a paper bag for a couple of days and they should be edible