Heat oil in a pan and add ginger-garlic paste, sauté until fragrant.
Add diced onions and green chillies, cook until onions are translucent.
Add capsicum and sauté for 2-3 minutes.
In a bowl, mix soy sauce, vinegar, cornflour, and salt.
Add cubed tofu to the pan, pour the sauce mixture, and stir gently to coat.
Cook for another 5-7 minutes until everything is well combined and heated through.
Garnish with fresh coriander leaves and serve hot.