Add chicken pieces to the skillet. Season with salt and pepper, and cook until browned and cooked through, about 7-10 minutes.
Return the Brussels sprouts to the skillet. Pour the honey-garlic sauce over the chicken and sprouts, stir to coat, and simmer for an additional 3-5 minutes until heated through and sauce thickens slightly.
Garnish with sesame seeds and chopped green onions before serving.
Notes
For a thicker sauce, let it simmer longer. Adjust salt based on soy sauce’s saltiness, and experiment with chili flakes for heat.