In a small bowl, whisk together the chicken broth, soy sauce, hoisin sauce, rice vinegar, sugar, and cornstarch. Set aside.
Heat sesame oil in a wok or large skillet over medium-high heat. Sauté the garlic, ginger, and dried red chili peppers until fragrant, about 1 minute.
Pour the sauce mixture into the wok and cook, stirring constantly, until the sauce thickens and becomes glossy, about 2-3 minutes.