Prep the chicken: Pat chicken dry.
Toss with 3 tablespoons cornstarch and a pinch of salt and pepper until lightly coated.
Whisk the sauce: In a bowl, combine soy sauce, rice vinegar, honey, broth, garlic, ginger, and sesame oil. Adjust sweetness or acidity to taste.
Toast sesame seeds (optional but recommended): In a dry skillet over medium heat, toast sesame seeds for 1–2 minutes until aromatic. Set aside.
Cook the chicken: Heat 1 tablespoon oil in a large skillet over medium-high.
Add half the chicken in a single layer. Cook 3–4 minutes per side until golden and cooked through. Transfer to a plate.
Repeat with remaining chicken, adding a bit more oil if needed.
Stir-fry veggies (if using): In the same pan, add a drizzle of oil and your chosen vegetables. Stir-fry 2–4 minutes until crisp-tender. Season with a pinch of salt.
Simmer the sauce: Return chicken to the pan.
Pour in the sauce and bring to a gentle simmer over medium heat.
Thicken: Stir in the cornstarch slurry. Cook 1–2 minutes, stirring, until the sauce turns glossy and lightly thickens to coat the chicken.
Finish: Sprinkle in toasted sesame seeds and a pinch of red pepper flakes if you like heat. Taste and adjust seasoning, sweetness, or acidity.
Serve: Spoon over brown rice, quinoa, or cauliflower rice.
Top with sliced scallions and a squeeze of lime for brightness.