Preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper for easy cleanup.
In a large bowl, combine the ground chicken/turkey, breadcrumbs, chopped green onion, minced ginger, garlic, egg, soy sauce, sesame oil, and a pinch of salt and pepper. Mix until just combined (do not overmix).
Form the mixture into small meatballs, about 1 inch in diameter, and place them on the prepared baking sheet.
Bake the meatballs in the preheated oven for 20-25 minutes or until they are cooked through and nicely browned.
Once the meatballs are done, remove them from the oven and drizzle teriyaki sauce over them. Toss gently to coat.
In meal prep containers, divide the cooked rice or quinoa evenly among the containers. Place a portion of steamed broccoli and shredded carrots in each container.
Top each bowl with a generous serving of teriyaki meatballs.
Sprinkle sesame seeds and extra chopped green onions on top for garnish.
Allow the meal prep bowls to cool before sealing them with lids.