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 topped loosely with a foil tent.
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 1 minute, stirring constantly.
Add the cornstarch to the cold chicken broth and mix thoroughly.
Add the chicken broth mixture to the mushrooms and simmer for 2-3 minutes to 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.