Preheat your oven to 425°F.
Pat the chicken breast dry with a paper towel. Lightly season both sides with salt, pepper, and a pinch of garlic powder.
Brush the chicken with teriyaki sauce, ensuring an even coating. For extra crispiness, lightly press for the sauce to adhere well.
Heat a non-stick skillet over medium-high heat. Sear the chicken for 2-3 minutes on each side until a golden crust forms.
While the chicken is searing, prepare the green beans by tossing them with olive oil, a pinch of salt, and pepper.
Spread the green beans evenly on a baking sheet and roast in the preheated oven for about 10-12 minutes, or until tender and slightly charred.
Transfer the seared chicken to an oven-safe dish. Pour any remaining teriyaki sauce over the chicken and place it in the oven. Bake for 8-10 minutes to ensure it is fully cooked.
Once cooked, slice the chicken and serve over a bed of roasted green beans. Sprinkle with sesame seeds for an added crunch and nutty flavor.