Follow these clear steps to create your Chicken Noodle Soup:

1. Sauté Vegetables: In a large pot, heat the olive oil over medium heat. Add the diced onion and sauté until translucent, about 3-4 minutes.
2. Add Garlic: Stir in the minced garlic and cook for an additional 1-2 minutes until fragrant.
3. Incorporate Carrots and Celery: Add the sliced carrots and celery. Cook for about 5 minutes until they begin to soften.
4. Pour in Broth: Add the chicken broth to the pot and stir until combined.
5. Season: Mix in the dried thyme, rosemary, salt, and pepper.
6. Add Chicken: Stir in the shredded cooked chicken and bring the mixture to a gentle boil.
7. Cook Noodles: Add the egg noodles and simmer for about 10 minutes or until they are cooked through.
8. Adjust Seasoning: Taste and adjust the seasoning with more salt and pepper if needed.
9. Garnish: Remove from heat and stir in fresh parsley for flavor and color.
10. Serve: Ladle the soup into bowls and enjoy warm.