Preheat your oven to 375°F (190°C). This ensures that your chicken cooks evenly and the rice gets perfectly fluffy.
In a large mixing bowl, whisk together the reduced-sodium soy sauce, light brown sugar, minced garlic, ground ginger, red pepper flakes, water, and cornstarch. Make sure the sugar and cornstarch are well combined and the mixture is smooth.
In your baking dish, spread the uncooked minute rice evenly across the bottom. Pour the chicken broth over the rice, followed by the pineapple chunks (with juice) and diced red bell pepper. Stir gently to mix.
Place the thin-sliced chicken breasts on top of the rice mixture, ensuring they are evenly spaced. Pour the teriyaki sauce over the chicken, making sure to coat each piece well.
Cover the baking dish with aluminum foil and bake in the preheated oven for 25 minutes. After this time, remove the foil and bake for an additional 15-20 minutes, or until the chicken is cooked through and the rice has absorbed most of the liquid.
Once baked, remove the dish from the oven and let it sit for a few minutes. Sprinkle with sliced green onions and sesame seeds before serving.