This is one of my mom's signature dishes!!! She does use Lipton's dry Onion Soup mix for the stock, however. Mom cooks them in a skillet; I prefer a slow cooker. They go great with cabbage or greens. If you think you have excellent table manners, you won't after this meal - you'll be sucking the meat out of the neckbone just like the rest of us.
I agree with the two above, turkey necks, rice and gravy is the bomb, good with any vegetable on the side, corn, peas, cabbage, whatever you like.
I also eat this in my family. My grandma makes this all the time, and since i have moved out i have been making it to usually for Sunday supper. I do all the things that your mother does i thought i was the only one that adds Lipton soup and peppers. I also eat this with rice and cabbage. Sometimes i will cook mac and cheese and dressing made with the stock. Very good comfort food.