- 1 block soft tofu
- 3 salted duck eggs
- 1/4 cup potato starch
- 1/4 cup all purpose flour
- 1/4 teaspoon baking powder
- 1/2 teaspoon salt, divided
- cooking oil
- 1/2 tablespoon minced garlic
- 1 1/2 tablespoons butter
Slice the tofu block into smaller pieces about 1-inch thick, then wrap/place them in several layers of paper towel. Place a moderately heavy object on top to drain out excess water for about 15 minutes. Be careful, if the object is too heavy, it may break the tofu.
While draining out water from the tofu, place the salted duck eggs in a small pot and cover with water. Bring it to a boil and then slightly reduce the heat and boil for another 10 minutes.
Rinse the eggs under cold water, then peel and discard the whites. Use a fork to mash the salted egg yolks finely, or use a spoon and press them against a sieve (mesh strainer).
In a shallow plate, mix together potato starch, all purpose flour, baking powder and ¼ teaspoon of salt. Heat a generous amount of oil to 300-320ºF (150-160ºC) in a deep fryer or medium saucepan. Pat dry and then coat each tofu piece with the flour mixture, shaking off excess flour and immediately deep fry for about 3 minutes until they turn lightly golden.
Remove the tofu and let cool slightly on a plate lined with paper towel or a wired rack. After a few minutes, bring the oil to 355ºF (180ºC) and deep fry the tofu the second time. This time, fry for about 1-1½ minutes until the tofu is golden and crispy. Remove the tofu to a plate lined with paper towel or a wired rack.
Heat a deep pan over medium heat (I recommend doing this after the first fry in Step 4, while waiting for a few minutes before frying the second time in Step 5). Add some oil and once the oil is hot, add minced garlic and sauté for a few seconds until fragrant. Add the mashed salted egg yolk and ¼ teaspoon of salt (to taste). Stir and break up the egg yolk pieces and let it absorb the oil. When it starts to look like a thick foamy sauce, adjust the heat to low and add butter. Stir to melt the butter and form a creamy sauce. This shouldn't take long, otherwise, the sauce may separate.
Immediately add the fried tofu pieces to the pan and quickly but gently shake the pan or use a wooden spoon to move the tofu pieces around and coat them with the sauce. Transfer to a serving plate and serve right away.