Heat oil in a wok; add garlic, ginger, lemon grass, bird's eye chilli, green chilli and sauté for 1 minute.
Add red chilli sauce and sauté for half a minute.
Add water and cook for 2 minutes.
Add white and black pepper, sugar, diced onion, button mushrooms, red, yellow and green capsicum.
Add oyster sauce and stir well to combine and season to taste.
Add lemon juice.
Fry K&N's Haray Bharay Nuggets as per instructions on pack and add, along with spring onion.
Cook for an additional minute and serve hot.