Prep the pork: Slice the pork thinly against the grain. Pat dry with paper towels so it sears instead of steams.
Make a quick marinade: In a bowl, mix 1 teaspoon cornstarch with 1 tablespoon soy sauce.
Toss the pork to coat. Let it sit for 10 minutes while you prep the veggies.
Stir fry sauce: In a small bowl, whisk together the remaining soy sauce, oyster sauce, rice vinegar, honey, sesame oil, 1 teaspoon cornstarch, and 1/4 cup water or broth. Set aside.
Heat the pan: Use a large skillet or wok over medium-high to high heat.
Add 1 tablespoon oil and wait until it shimmers.
Sear the pork in batches: Add half the pork in a single layer. Cook 1–2 minutes per side until browned and just cooked through. Remove to a plate.
Repeat with another tablespoon oil and the remaining pork.
Aromatics: Add the last tablespoon of oil if needed. Toss in garlic, ginger, and the white parts of the scallions. Stir for 30 seconds until fragrant.
Cook the veggies: Add broccoli and carrots first.
Stir fry 2 minutes. Then add bell pepper, mushrooms, and snap peas. Cook another 2–3 minutes until crisp-tender.
Don’t overcook.
Combine and sauce: Return pork and any juices to the pan. Give the sauce a quick stir, then pour it in. Toss for 1–2 minutes until it thickens slightly and coats everything.
Finish: Taste and adjust with a splash more soy for salt, a squeeze of lime for brightness, or a drizzle of honey for sweetness.
Turn off the heat and add the green parts of the scallions.
Serve: Spoon over warm brown rice or cauliflower rice. Sprinkle with sesame seeds if you like.