Cook your base: Make your rice or quinoa according to package directions. Fluff and keep warm.
Whisk the sauce: In a bowl, mix soy sauce, rice vinegar, honey, mirin, sesame oil, water, cornstarch, and red pepper flakes. Whisk until smooth and no cornstarch lumps remain.
Prep the produce: Chop broccoli into bite-size florets, slice carrots and bell pepper, mince garlic, grate ginger, and slice green onions.
Blanch or steam broccoli: For crisp-tender broccoli, quickly steam or microwave with a splash of water for 2–3 minutes.
Drain and set aside. This step keeps the skillet from overcrowding later.
Brown the turkey: Heat 1 tablespoon oil in a large skillet over medium-high heat. Add ground turkey and the white parts of the green onions.
Season lightly with salt and pepper. Cook, breaking it into small crumbles, until no pink remains and edges are browned, about 5–7 minutes. Push the turkey to one side of the pan.
Sauté aromatics and veggies: Add a little more oil if the pan looks dry.
Add garlic and ginger to the empty side and cook 30 seconds until fragrant. Add carrots and bell pepper. Stir everything together and cook 3–4 minutes until slightly tender but still crisp.
Add broccoli and sauce: Toss in the broccoli.
Whisk the teriyaki mixture again and pour it over the turkey and vegetables. Stir continuously as it thickens and turns glossy, 1–2 minutes. If it gets too thick, splash in a bit of water to loosen.
Taste and adjust: Add more honey for sweetness, soy sauce for salt, or chili flakes for heat.
Remove from heat.
Assemble bowls: Spoon rice into bowls. Top with the turkey teriyaki mixture. Sprinkle with sesame seeds and the green onion tops.
Serve hot.