Separate out the egg yolks from salted eggs.
Steam egg yolks for 10 minutes.
Cube tofu and boil for 10 minutes.
Mash egg yolks.
In a pan, add cooking oil and saute minced ginger for 10 seconds.
Cook the mashed egg yolks until it starts bubbling.
Add water, and braise the tofu in the salted egg yolk sauce for 10 minutes.
Cornstarch slurry in to thicken the sauce.
Serve with spring onion as garnish.