I reduced the amount of flour for thickening because I was using homemade noodles. For making your own homemade noodles for this recipe, use 3 eggs, 1 T. water, and 2 3/4 cups flour. If you are not using fresh homemade noodles, you may need more thickener.
Although spelt is an ancient form of wheat, most people with wheat allergies can eat it with no problem. However, it still contains gluten, so avoid spelt if you have a reason to avoid gluten.
Better than Bouillon organic beef and chicken bases are my favorite to use in broths because they are gluten free and soy free.