My son used to work at a steak house that roasted their prime rim on the bone and served it off the bone. They used to pitch the bones......My son asked me if I wanted some bones and of course I said yes. He brought over 2-5 gallon buckets full of rib bones. I took 1 can of tomato paste and diluted it ith about a cup of water and poured this over the bones. I then spread them out onto a cookie sheet that had some onion and celery and carrot chunked up...Roast the bones in a 300 deg oven until browned. Then put the lot into a large stock pot and cover with cold water and boil at least 4 hours. Season with salt and pepper at this time. Strain and freeze or do like I did and can it. I did not find it too sweet and was very good just to have a cup of stock. I also used it as a base for my veg beef soup....very rich.

my son no longer works for this restaurant.........alas.