In a large bowl, combine the ground meat, breadcrumbs, chopped green onions, beaten egg, minced garlic, and grated ginger. Mix until fully incorporated.
Form the mixture into small meatballs, about 1 inch in diameter, and place them on a baking sheet lined with parchment paper.
Bake the meatballs in the preheated oven for about 15-20 minutes or until cooked through and browned.
While the meatballs are baking, prepare the teriyaki sauce. In a small saucepan, combine soy sauce, brown sugar, rice vinegar, and sesame oil. Heat over medium heat until the sugar is dissolved, stirring occasionally, then reduce to a simmer to thicken slightly.
In a separate pot, steam or boil the broccoli florets and carrot julienne for about 5-7 minutes until tender but still crisp.
Once the meatballs are cooked, toss them in the teriyaki sauce until well coated.
To assemble the rice bowls, start with a base of cooked jasmine rice, top with meatballs, broccoli, and carrots. Drizzle with any extra teriyaki sauce.
Garnish with sesame seeds and additional chopped green onions.
Notes
Feel free to add other vegetables or adjust the sauce to your taste.