Step 1

Place the pork and 2 tablespoons of the soy sauce in a non-metallic bowl. Toss until the pork is well coated. Cover and refrigerate for 10 minutes.

Step 2

Place the remaining soy sauce in a small bowl and combine with the tomato sauce, vinegar and brown sugar. Set aside.

Step 3

Place a wok or large non-stick frying pan over medium-high heat and spray with oil spray. Cook the pork in batches until browned, then remove and wipe out the wok with paper towel.

Step 4

Spray the wok with a little more oil spray. Add the onion and capsicum and stir-fry for 4 minutes or until just tender. Return the pork to the wok, along with the cherry tomato, pineapple and soy sauce mixture and cook for another 3 minutes. Serve immediately with steamed rice.