Follow these steps to make your delicious Grilled Teriyaki Chicken Bowls:

1. Prepare the Marinade: In a bowl, whisk together soy sauce, brown sugar, rice vinegar, sesame oil, minced garlic, and grated ginger until well combined.
2. Marinate the Chicken: Place the chicken breasts in a resealable plastic bag and pour half of the marinade over them. Seal the bag and refrigerate for at least 30 minutes (up to 2 hours for more flavor).
3. Cook the Rice: While the chicken is marinating, prepare the rice according to package instructions. Keep warm until serving.
4. Preheat the Grill: Heat the grill to medium-high heat.
5. Grill the Chicken: Remove the chicken from the marinade and discard the marinade. Grill the chicken breasts for about 6-8 minutes on each side or until fully cooked. The internal temperature should reach 165°F (75°C).
6. Sauté the Vegetables: In a skillet over medium heat, add a splash of sesame oil and sauté your choice of vegetables until they are tender-crisp, about 5 minutes.
7. Slice the Chicken: Once done, remove the chicken from the grill and let it rest for a few minutes. Slice it into strips.
8. Assemble the Bowls: In each bowl, add a base of rice, followed by a generous portion of grilled chicken and sautéed vegetables. Drizzle with additional teriyaki sauce if desired.
9. Garnish: Sprinkle sesame seeds and sliced green onions over the top for an added touch of flavor and presentation.

These simple steps will lead you to a fantastic meal that is both nutritious and delicious.