1. Place all the ingredients for the Terakihi sauce into a bowl and mix together. Add the tofu and set aside to marinate for 15 minutes.
2. Spray a wok or large frying pan with the low-calorie cooking spray and place it over a medium heat.
3. Add the onions, pepper, broccoli and garlic and fry until slightly softened.
4. Add the tofu and fry until slightly golden (add more low-calorie cooking spray if needed.)
5. Add the baby corn, spring onions and mushrooms and fry for a further 3 minutes.
6. Poor in the oyster sauce, white wine vinegar and vegetable stock, lower the heat and let it simmer until the sauce reduces and thickens.
7. Place the noodles in a large bowl, cover with boiling water and let stand 2 minutes. Rinse thoroughly in cold water and drain, then add to the stir fry and mix it altogether.