Prep the chicken: Pat the chicken dry and slice it thinly against the grain. Season lightly with salt and pepper.
This helps it sear quickly and stay tender.
Whisk the sauce: In a bowl, mix soy sauce, rice vinegar, oyster sauce, honey, sesame oil, broth, cornstarch, and red pepper flakes or sriracha. Whisk until smooth with no cornstarch lumps.
Heat the pan: Set a large skillet or wok over medium-high heat. Add half the oil and swirl to coat.
Sear the chicken: Add the chicken in a single layer.
Cook 3–4 minutes, stirring once or twice, until just cooked through and lightly browned. Remove to a plate.
Cook the aromatics: Add the remaining oil. Toss in garlic and ginger.
Stir for 20–30 seconds until fragrant, being careful not to burn.
Stir-fry the veggies: Add sweet peppers, red onion, and snap peas. Stir-fry 3–4 minutes until crisp-tender. They should still have color and a slight bite.
Combine and sauce: Return chicken to the pan.
Stir the sauce and pour it in. Cook 1–2 minutes, stirring, until it thickens and coats everything.
Taste and adjust: Add a splash of soy for salt, a squeeze of honey for sweetness, or a bit more vinegar for brightness as needed.
Finish: Remove from heat. Garnish with green onions and sesame seeds.
Serve hot over your choice of base, or portion into meal prep containers.