In a medium bowl, whisk together soy sauce, honey, rice vinegar, sesame oil, minced garlic, grated ginger, and red pepper flakes (if using).
Cut the chicken thighs into bite-sized pieces and add them to the marinade. Toss to coat and let marinate for at least 10 minutes (or up to 30 minutes in the refrigerator).
Heat a large skillet or wok over medium-high heat. Add the marinated chicken and cook, stirring occasionally, until browned and cooked through, about 6-8 minutes. The sauce will thicken as it cooks.
To assemble the bowls, divide the cooked rice among four bowls. Top with the sticky chicken, steamed broccoli, shredded carrots, and sliced green onions.
Garnish with sesame seeds and serve immediately.
Notes
Feel free to add other vegetables like bell peppers or snap peas to your rice bowls.