Marinate the chicken: In a bowl, whisk together soy sauce, bourbon, honey, stevia, ginger, garlic, and red pepper flakes. Reserve ½ cup (120ml) of marinade for sauce. Toss chicken cubes with remaining marinade. Cover and refrigerate for 30 mins (or overnight for deeper flavor).
Make the sauce: Mix reserved ½ cup of marinade with chicken broth and cornstarch until smooth. Set aside.
Cook the chicken: Heat sesame oil in a large skillet or wok over high heat until shimmering. Using tongs, remove chicken from marinade (let excess drip off) and sear in a single layer for 2 mins per side until golden. Work in batches if needed to avoid crowding.
Finish the dish: Reduce heat to medium. Pour sauce over chicken and simmer for 3-4 mins, stirring constantly, until sauce thickens and coats the chicken like glossy lacquer.
Serve: Garnish with sesame seeds and sliced scallions. Perfect over cauliflower rice (0pts) or brown rice (additional points).