That’s a good recipe, I’ve done that. Here in northern Colorado, if Vidalia onions aren’t available, Walla Walla onions are a good substitute. And there are some locally grown onions that are pretty sweet as well.
Hear of them, but never seen them in a store down here.
We'll try them if we get a chance.
While we're on the subject of "special produce", have you ever encountered Tennessee tomatoes? They come from East Tennessee, over around Marysville, and are purportedly better the higher on the mountain they're grown. They come off in late summer -- late August thru September. Outstanding!!! Even better than the East Texas vine-ripes from around Quitman, TX.