In a large skillet over medium-high heat add olive oil. Once the oil is hot, add the chicken. Brown on each side for about 6-8 minutes.
Once the chicken is browned, add the ginger and garlic and continue cooking for another 2 minutes.
In a small bowl, mix the teriyaki sauce, chicken broth, sesame oil, salt, and black pepper. Pour over the chicken. Reduce heat and simmer for 12 minutes.
In a separate small bowl, mix cornstarch with water and pour over the chicken. Stir and continue cooking until the sauce has thickened.
Remove from heat, and sprinkle with sesame seeds and green onion.