In a bowl, marinate the diced chicken with 2 tablespoons of teriyaki sauce for at least 15 minutes.
Heat 1 tablespoon of vegetable oil in a large skillet or wok over medium-high heat. Add the marinated chicken and cook until it's browned and cooked through (about 5-7 minutes). Remove the chicken from the skillet and set aside.
In the same skillet, add the remaining tablespoon of oil. Add the minced garlic and grated ginger, sautéing them for about 30 seconds until fragrant.
Add the mixed vegetables to the skillet and stir-fry for about 3-4 minutes until they are tender.
Push the vegetables to one side of the skillet and pour in the beaten eggs on the other side. Scramble the eggs until fully cooked, then mix everything together.
Add the cooked jasmine rice to the skillet, breaking up any clumps. Pour in the remaining 1 tablespoon of teriyaki sauce and toss the rice until it's evenly coated with sauce and heated through.
Add the cooked chicken back to the skillet and mix well to combine all ingredients. Season with salt and pepper to taste.
Finally, sprinkle the chopped green onions and toss everything together for a minute to combine flavors.
Serve hot, garnished with sesame seeds.
Notes
Using day-old rice helps achieve the best texture.