Heat the sesame oil in a large skillet or wok over medium-high heat.
Add the diced onion and cook for several minutes until softened.
Add the ground turkey and cook, breaking it apart with a spatula, until fully cooked and no longer pink. The turkey should reach an internal temperature of 165°F (74°C).
Add the broccoli and shredded carrots. Cook until the vegetables are tender-crisp and heated through.
Reduce the heat to low and pour in the prepared teriyaki sauce.
Stir everything together and simmer for a few minutes until the sauce coats the turkey and vegetables.
Serve the Ground Turkey Teriyaki Stir Fry over cooked rice, noodles, or your preferred grain.