In a wok, over high heat, add 2 tablespoons oil and when hot, working in batches, add the chicken and cook until lightly browned, about 3 to 5 minute Remove and set aside.
Reduce the heat to medium, add the garlic, ginger and red pepper flakes and cook until fragrant, about 30 sec. Add in the apple juice, sugar, ketchup, vinegar, whiskey and soy sauce and cook stirring until the sugar dissolves, about 1 minute Return the chicken and bring to a boil. Lower heat to low and simmer for 20 minute.
In the meantime, cook the rice according to package directions. Serve the chicken over the rice and garnish with the scallions.