Dice the chicken breast into bite-sized pieces and season with sea salt and black pepper.
Heat the olive oil in a large pot over medium-high heat and sear the chicken until golden brown on all sides.
Add the diced onion, celery, and minced garlic to the pot, sautéing for 3 minutes until the aromatics are soft and fragrant.
Stir in the cubed sweet potato, parsnips, and carrots, ensuring they are well-coated in the herb-infused oil.
Add the dried thyme and dried rosemary, stirring for 1 minute to release the essential oils.
Pour in the vegetable broth and bring the mixture to a gentle boil.
Reduce the heat to low, cover the pot, and simmer for 20 to 25 minutes until the root vegetables are tender and the chicken is cooked through.
Ladle the hot stew into a bowl and serve immediately.