Cook the Rice:
In a medium saucepan, bring 2 cups of water to a boil. Add the rice and salt, then reduce the heat to low. Cover and simmer for 20-25 minutes, or until the rice is tender and has absorbed all the water.
Cook the Chicken:
While the rice is cooking, heat sesame oil in a large skillet over medium-high heat. Add the chicken pieces and cook, stirring occasionally, until the chicken is browned on all sides and fully cooked through, about 6-8 minutes.
Add Teriyaki Sauce:
Pour the teriyaki sauce over the cooked chicken. Stir to coat the chicken evenly, and let it cook for an additional 2-3 minutes until the sauce thickens slightly and the chicken is glossy.
Assemble the Stack:
On a plate, place a serving of cooked rice. Top the rice with a few slices of fresh avocado, then spoon the teriyaki chicken over the top.
Serve and Enjoy:
Serve immediately while everything is still warm. Enjoy the layers of flavor in every bite!