On an oiled hot skillet, cook turkey necks, creating browned sides. Remove them from the skillet and set aside. Cook onion in the same skillet, until it's browned a little. Season meat and vegetables with salt, add one cup of hot water to the dish. Place it in an oven at 350F to bake for 1.5 hours or until meat begins to fall off the bone. Serve turkey necks with potatoes, rice or simply on their own, while they are still warm.