To prepare the peanut sauce, combine the chicken stock, peanut butter, soy sauce, maple syrup, cayenne pepper, lime juice, and garlic powder in a small saucepan over medium heat. Simmer gently, stirring frequently, until the sauce is smooth and slightly thickened, around 5-6 minutes. Remove from heat and transfer to a serving container. Top with fresh cilantro and roasted peanuts and set aside.