Soak the soy chunks in hot water for about 15 minutes, then drain and squeeze out excess water.
Toss the soaked soy chunks with cornstarch and a pinch of salt.
Heat oil in a pan and fry the soy chunks until golden and crispy. Remove and set aside.
In the same pan, add sliced onions and green chillies, sauté until onions are translucent.
Add ginger-garlic paste and sauté for a minute until fragrant.
Add sliced capsicum and cook for 2–3 minutes.
Stir in soy sauce, vinegar, black pepper powder, and salt.
Add the fried soy chunks back into the pan, mix well to coat.
Cook for another 2–3 minutes, then garnish with fresh coriander leaves.
Serve hot with rice or roti.