Preheat the oven to 400°F (200°C). Line a sheet pan with parchment paper or spray with cooking spray for easy cleanup.
In a large mixing bowl, combine the teriyaki sauce, minced ginger, sesame oil, honey, garlic, black pepper, and salt. Whisk until well combined.
Add the chicken thighs to the bowl and toss to coat them evenly in the marinade. Let them marinate for at least 10 minutes (or up to 30 minutes for more flavor).
While the chicken is marinating, prepare the broccoli florets. Place them in a separate mixing bowl, drizzle with olive oil, and sprinkle with a pinch of salt and pepper. Toss to coat evenly.
Arrange the marinated chicken thighs on one side of the prepared sheet pan. Spread the broccoli florets on the other side of the pan.
Bake in the preheated oven for 20-25 minutes, or until the chicken is cooked through (internal temperature of 165°F/74°C) and the broccoli is tender and slightly crispy.
In the last 5 minutes of baking, sprinkle the sesame seeds over both the chicken and broccoli for added crunch and flavor.
Once done, remove the pan from the oven and garnish with sliced green onions before serving.