Mix the STIR-FRY SAUCE ingredients together in a cup. Set aside.
Heat a wok or frying pan over high heat. Drizzle in oil and swirl around, then add the ginger, garlic, chili and onion. Stir-fry 2-3 minutes to release the flavors.
Add the pork and stir-fry 3-4 minutes, adding 2 Tbsp. stir-fry sauce as you go.
Add the bell peppers and continue stir-frying, gradually adding all remaining stir-fry sauce until the dish is cooked to your liking.