Cook the rice. Start your rice first so it’s hot when the chicken is ready.
Short-grain white rice gives the classic bowl feel, but jasmine or brown rice also works.
Mix the teriyaki sauce. In a small bowl, combine soy sauce, mirin, sake (or sherry), brown sugar or honey, garlic, ginger, and rice vinegar. Taste and adjust sweetness or tang. Set aside.
Prep the chicken. Trim excess fat and cut chicken into bite-size pieces.
Pat dry and season lightly with salt and pepper. Dry chicken browns better.
Optional quick marinade. If you have 10–15 minutes, toss the chicken with 2 tablespoons of the sauce. This adds flavor fast without a long wait.
Sear the chicken. Heat a large skillet over medium-high and add neutral oil.
Add the chicken in a single layer. Let it sear without moving for 2–3 minutes, then stir and cook until lightly browned and cooked through, about 6–8 minutes total. Remove to a plate.
Blanch or sauté veggies (optional). While the pan is hot, quickly sauté broccoli or snap peas with a splash of water until crisp-tender.
Season with a pinch of salt. Remove and keep warm.
Thicken the sauce. Lower the heat to medium. Pour the remaining sauce into the skillet and bring to a gentle simmer.
Mix cornstarch with water to make a slurry, then whisk it into the simmering sauce. Cook 1–2 minutes until glossy and slightly thick.
Coat the chicken. Return the chicken to the pan and toss to coat. Add a small splash of water if the sauce gets too thick.
Stir in sesame oil for a nutty finish.
Assemble the bowls. Spoon hot rice into bowls. Top with teriyaki chicken and optional veggies. Scatter sliced green onions and sesame seeds over the top.
Serve. Enjoy right away while the rice is steamy and the sauce is silky.