Preheat the oven to 450°F. Line a large baking sheet with parchment paper and set the baking sheet aside.
Sauté the vegetables. On medium heat melt the butter in a large skillet. Add the diced onion and celery with a pinch of salt, and sauté the vegetables until softened about 5 minutes.
Add the starch, seasonings, and fresh herbs. Sprinkle the arrowroot powder, salt, black pepper, garlic powder, paprika, rosemary, thyme, and sage over the onion and celery mixture. Whisk together until smooth.
Add the liquid. Turn the heat to high and gradually stir in the chicken stock, almond milk, and coconut aminos.
Add the chopped carrots and diced potatoes. Bring the mixture to a boil and lower to a simmer, stirring frequently until the liquid has thickened, about 15-20 minutes. The potatoes and carrots should be tender when pierced with a fork.
Add the frozen vegetables and chicken. Cook for another 5 minutes, until the vegetables are tender. Turn off the heat and stir in the diced chicken