While waiting for the water to boil, wash the produce. Cut onion, carrots and celery into chunks and add to simmering broth. Crush and peel garlic and add that to the broth along with peppercorns. Simmer 2.5 to 3 hours on low, adding a little bit more water if needed. Strain broth into a second pot (at least 5 quart) and discard the bones and veggies once cooled. Add the chicken bouillon and stir to dissolve. You can freeze this for later or move right into making soup.
Bring broth to a boil, and add chopped veggies and chicken. Boil until veggies are almost done (about 15 minutes) and then add the noodles and cook until tender. At this point you can thicken the broth by adding a small amount of corn starch or flour dissolved in water. ( 2 T. to 1/4 C. water) Just make sure to add it slowly and whisk it in fast to avoid lumps. Adjust the recipe as needed to suit your tastes.