Heat a large stockpot over medium heat and add olive oil, letting it warm up until it shimmers.
Add the minced garlic to the hot oil and cook, stirring constantly, until fragrant and just starting to turn golden, about 30 seconds to 1 minute.
Place the chicken breasts into the pot and pour in the chicken broth, ensuring the chicken is mostly submerged.
Add dried thyme and rosemary to the broth, then season with a little salt and pepper. Bring the broth to a gentle simmer and cook the chicken until it is cooked through, about 15 minutes.
While the chicken simmers, zest the lemon and set aside. Once cooked, remove the chicken from the broth and let it rest for a few minutes.
Shred the chicken into bite-sized pieces and set aside.
Return the shredded chicken to the broth, then add lemon juice and zest to brighten the flavor. Bring the broth back to a gentle simmer.
Add the uncooked noodles directly into the simmering broth and cook until al dente, about 8 minutes, until the noodles are tender but still have a slight bite.
Taste the soup and adjust salt, pepper, and lemon juice as needed for brightness and seasoning.
Ladle the hot soup into bowls, garnish with chopped fresh parsley, and serve immediately for maximum warmth and freshness.
Enjoy the fragrant, steaming bowl of lemon herb chicken noodle soup, perfect for cozy moments.