Shred the rotisserie chicken and set aside.
In a large pot, heat oil over medium heat.
Add chopped onions and sauté until translucent.
Stir in minced garlic and cook for an additional minute.
Add chopped carrots and celery, cooking for about 5 minutes.
Pour in the chicken broth and bring to a boil.
Add diced potatoes, thyme, salt, and pepper.
Reduce heat to a simmer and cover the pot.
Cook for 20 minutes or until the vegetables are tender.
Stir in the shredded chicken and heat through before serving.