Cut the tofu into bite-sized pieces.
Julienne the onion, green onion, and carrot.
Heat cooking oil in a pan and fry the tofu until golden brown.
Remove the tofu and stir-fry the vegetables in the same pan.
Add the cooked noodles and stir-fry together.
Season with oyster sauce.
Add the fried tofu and mix everything well.
Transfer to a plate and sprinkle sesame oil and sesame seeds as desired.