Add in the stock, tomato paste, and turkey. Let it come to a boil, then let simmer for an hour. My barley was precooked so I added it in the last 20 minutes.
Take the pot off the heat and serve with some rosemary loaf bread or dinner rolls.
Recipe by Honey and Dates at https://www.honeyanddates.com/2014/12/03/hearty-turkey-barley-soup/