Chop a large onion, 3 cloves of garlic, and a piece of dried shrimp (soak in a little bit of water first) finely.
Place the chopped ingredients into a wok and sauté with 2 tablespoons of chilli flakes until slightly crispy.
Add chicken to the wok and stir-fry for a moment until it's cooked through.
Add oyster sauce, soy sauce, tomato sauce, and 1 liter of water. Bring to a boil.
Once boiling, add chicken stock cube, white pepper powder, and salt. Simmer for about 5 minutes.
Add sliced Chinese cabbage, tomatoes, and shrimps. Stir-fry well until vegetables are cooked but still slightly crunchy.
Break in two eggs into the soup and stir to scramble them. Add cornstarch mixture (2 tablespoons of cornstarch mixed with water) to thicken the sauce at the end.
Serve yellow noodles and wonton leaves on a plate, then pour the soup over it.
Top with fried onions flakes just before serving for best texture.