Add evaporated milk, chicken stock, thyme, salt, pepper, diced chicken. Stir and bring to a boil.
To make dumplings, mix self rising flour, a pinch of salt (any seasonings that you may want, like garlic powder, onion powder and/or thyme), and greek yogurt in a stand mixer for 5 minutes. Separate into 1 inch round balls. (Cass says don't waste time rolling it into a ball. Just pinch it off and drop it in) Add to soup.