I take it pan dressing is cornbread dressing sans the sausage? Soak it in a few whole beaten eggs and enjoy your savory French toast.
Nope - just toasted bread torn or cut into small bits, butter-sauteéd onion and celery, sometimes bits of turkey (back then there was not the hesitancy there may be today about using giblets since the birds were raised free range), a bit of turkey or chicken broth, savory herbs (sage, thyme etc), baked until it crisps up a bit... like what one might stuff a turkey with, but made extra and served on the side along with the other side dishes at the holiday meal. Usually topped with some turkey gravy at table.
I think it's approximately what the commercial "stove top stuffing" may have been based on, only of course the real thing is not made on the stove top and so also lacks that whole list of "added ingredients" aka preservatives and so forth.
My grandma realized it was a hit and graduated over the years from making a little of it in an 8x8 pan (just to be able to serve something up if whoever was helping serve had got too generous dishing out the actual turkey-stuffing onto the plates), into then making it in a 9x13 pan and finally in a lasagna pan... and around then she announced one night as that emerged from the oven : "There'll be no standing out here with a fork attacking the leftovers straight from the refrigerator, please: pan dressing is just a side dish and we're making enough now to feed an army, yet it's gone before the weekend."
Oops. We (since I was not alone in that habit) had been outed by someone. I always suspected it was my grandma's longtime kitchen helper, who perhaps had tired of finding a larger pan each year to make the stuff in, and preparing so much more of the ingredients. The dish remained really popular though; even some kin who are vegetarian feature it at their own holiday meals now, sans the poultry-related ingredients.
Sigh... carbos... We were raised with bread and butter on the table at any meal. Last time I picked up my eyeglasses prescription the optician confided she was struggling with a doctor's weight loss recommendation along lines of "simply leaving the bread off the table is a good start". To me that day she said "But I'm Italian American and what he said just rang out as complete heresy."
I'm with her. Sure I focus on whole grain breads now... but bread does talk to me in the store, and if I make sandwiches with lettuce wraps for awhile then sure enough one night I'm out there making pan stuffing out of half a loaf of bread I'd stashed in the freezer, and it's not meant to be a side dish either. At least so far I stick to an 8x8 pan...