Cut the tops off the bell peppers and remove the seeds and membranes. Drizzle the insides with a little olive oil and sprinkle with salt and pepper. Place them upside down in a baking dish.
In a skillet, heat a drizzle of olive oil over medium heat. Add the chopped onions and garlic, and sauté until softened, about 3-4 minutes.
Add the diced chicken thighs to the skillet, season with salt and pepper, and cook until browned and cooked through, about 6-8 minutes.
Stir in the cooked rice, teriyaki sauce, peas, and carrots. Mix well and cook for an additional 2-3 minutes until everything is heated through.
Carefully spoon the teriyaki chicken mixture into each bell pepper, packing it down gently to fill them generously.
Cover the baking dish with foil and bake in the preheated oven for 25-30 minutes.
Remove the foil and bake for an additional 10 minutes to allow the tops to get slightly crispy.
Once done, remove from the oven and let cool for a couple of minutes. Garnish with sliced green onions and sesame seeds before serving.
Notes
Serve the stuffed peppers on a colorful platter, drizzling a little extra teriyaki sauce on top for added flavor and visual appeal.