Heat the pan into medium heat, drizzle a tablespoon of vegetable oil. Stir fry the tofu pieces until light golden brown. Remove the tofu pieces from pan and set aside.
Add the garlic slices into the pan and stir fry for few seconds, next add the onion cubes and stir fry for few seconds.
Place the shitake mushroom and lotus root and stir fry for 1-2 minutes.
Follow with the bell pepper and place the fried tofu back in the pan. Season with, soy sauce, oyster sauce, black pepper, chilli oil. You can add salt to taste or skip salt according to your preference.
Mix well to combine all ingredients evenly and continue stir fry with medium high heat for another 1-2 minutes.
Sprinkle spring onions in the final step and toss well. Transfer to serving plate and serve immediately.
Perfect with hot streamed rice or simple stir fry noodle. Enjoy!