I liked this recipe and so did my wife. But we made some changes. I bought chicken broth with spices so I skipped the salt and thyme and used ground turkey instead of chicken. I only used lemon zest as well, frozen carrots and peas, but fresh onion, celery, and parsley. The cook time of 3 hours on low was fine and then I added the zest, parsley, and egg noodles for 30 more minutes. My wife liked the addition of the lemon zest and it made about 3 quarts of soup.
The instructions for this soup were not very good. I followed the directions however my vegetables on low for 3 hours were still hard. It was a filling soup but I would not recommend this recipe and the soup lacked flavor overall even with the thyme and the lemon. It also rendered a lot more servings than indicated.