To make this Stuffing Dumpling Soup gluten free, replace the all-purpose flour with a gluten-free 1:1 baking flour blend and use gluten-free stuffing in place of traditional bread stuffing. Also confirm that the chicken stock or turkey stock is certified gluten free, as some packaged stocks may contain additives or be processed with gluten-containing ingredients. Because gluten-free stuffing can vary in texture, the dumpling mixture may need slight adjustment; if it feels too loose, add a small amount of additional gluten-free flour until the mixture holds together more easily.