Gather all your ingredients: chicken thighs, vegetables, herbs, broth, and fresh lemon.
Heat a large heavy-bottomed pot over medium heat and add olive oil. Once shimmering, add the chicken thighs and brown them on each side for about 5 minutes, until golden. Remove and set aside.
Add diced carrots, chopped celery, and a pinch of salt to the same pot. Sauté, stirring occasionally, for about 5-7 minutes until the vegetables start to soften and release a sweet aroma.
Stir in the minced garlic and chopped thyme, cooking for about 30 seconds until fragrant. Be careful not to burn the garlic.
Return the browned chicken thighs to the pot, placing them on top of the vegetables. Pour in the chicken broth, ensuring the chicken is mostly submerged.
Bring the mixture to a gentle simmer, then cover the pot and cook on low heat for about 1 hour, allowing the flavors to deepen and the chicken to become tender.
Remove the chicken thighs from the soup and set aside to cool slightly. Shred the meat with forks, discarding skin and bones if any.
Return the shredded chicken to the pot and stir well. Test the seasoning and adjust salt if needed.
Squeeze fresh lemon juice into the soup, stirring to brighten the overall flavor. Let it simmer for another 5 minutes.
Sprinkle chopped parsley over the soup just before serving for a fresh, vibrant touch. Ladle into bowls and enjoy this warm, comforting dish.