Step 1: Preheat & prep:
Preheat oven to 350°F (175°C).
Grease a 9x13-inch baking dish.
Step 2: Make the teriyaki sauce:
In a saucepan, whisk soy sauce, water/broth, brown sugar, honey, garlic, ginger, and rice vinegar.
Bring to a gentle simmer.
Stir in cornstarch slurry and cook 1–2 minutes until glossy and slightly thick.
Turn off heat. Reserve 2–3 tbsp for finishing.
Step 3: Cook or prep the chicken:
Option A (baked-shred, extra tender):
Lay raw chicken breasts/thighs in the baking dish.
Pour 1/3 of the teriyaki sauce over.
Cover and bake 20–25 minutes until cooked.
Remove, shred or chop, return to dish.
Option B (fastest):
Use already cooked/shredded chicken or rotisserie.
Skip extra baking time.
Step 4: Assemble the casserole:
Add 3 cups cooked rice to the baking dish.
Add 2–3 cups vegetables (frozen can go straight in).
Add the cooked/shredded chicken.
Pour the rest of the teriyaki sauce over and toss to coat. The mixture should look moist — rice will drink some up.
Keep the reserved 2–3 tbsp sauce for later.
Step 5: Bake:
Cover with foil and bake 20–25 minutes until heated through and bubbling at the edges.
Uncover for the last 5 minutes so the top looks shiny, not steamed.
Step 6: Finish & serve:
Drizzle the reserved teriyaki over the top.
Sprinkle green onions and sesame seeds.
Serve hot right from the dish.