Mix the sauce: In a small bowl, whisk soy sauce, water, brown sugar or honey, rice vinegar, sesame oil, and cornstarch until smooth.
Set aside.
Prep the aromatics: Mince the garlic, grate the ginger, and slice the green onions. Separate white and green parts.
Sauté the turkey: Heat oil in a large skillet over medium-high. Add turkey and break it up with a spatula.
Cook 5–7 minutes until no longer pink and lightly browned.
Add aromatics: Stir in garlic, ginger, and the white parts of the green onions. Cook 1–2 minutes until fragrant.
Cook the veggies: Add your vegetables to the skillet. Stir-fry 3–4 minutes until crisp-tender.
If using broccoli, add a splash of water and cover for 1 minute to steam.
Pour in sauce: Give the sauce a quick stir (cornstarch settles), then pour it over the turkey and veggies. Stir and simmer 1–2 minutes until glossy and thickened. If too thick, add a tablespoon of water at a time.
Adjust seasoning: Taste and add more soy for salt, more sugar/honey for sweetness, or red pepper flakes for heat.
Assemble bowls: Spoon rice into bowls.
Top with turkey teriyaki mixture. Finish with green onion tops, sesame seeds, and a drizzle of sriracha if you like.