Heat the olive oil in a large skillet over medium-high heat.
Season the chicken thighs with sea salt, freshly cracked pepper, and garlic powder, to taste on both sides. Once the pan is hot, add the chicken and cook for 5-6 minutes per side, or until cooked through. Remove the chicken from the pan and place it on a plate with a tin foil tent covering it.
Add the butter to the skillet then add the chanterelle mushrooms and shallot. Sauté for 5-6 minutes or until golden brown; add the minced garlic and sauté for an additional 1 minute, stirring constantly.
Add the corn starch to the cold chicken stock and mix thoroughly.
Add the chicken stock mixture to the mushrooms and let it simmer for 2-3 minutes so it can reduce and thicken. Season with sea salt and freshly cracked pepper, to taste.
Add the chicken thighs along with any juices back to the sauce and simmer for 1 minute. Place on a serving dish and serve immediately. Enjoy.