Pre-fry the tofu. Heat a portion of the cooking oil in a pan over medium heat. Fry the tofu cubes until the surface forms a thin, lightly golden crust. Remove and drain on paper towels. This step keeps the tofu from breaking apart when folded into the batter later.
Dissolve the Egg Powder Mix. Combine 39 g of Egg Powder Mix with 117 ml of water in a medium bowl. Stir gently until fully dissolved with no lumps remaining. Allow to rest for 1 to 2 minutes to stabilise before use. Prepare the tofu egg batter. Add the chicken bouillon powder and ground white pepper to the dissolved egg mixture. Stir to combine. Add the pre-fried tofu and fold gently until all sides are evenly coated.
Fry the tofu egg. Heat the remaining oil in a non-stick pan over medium heat. Pour in the entire tofu batter and spread it evenly across the pan. Allow the bottom to set and turn golden brown, about 3 to 4 minutes, then carefully flip and cook the other side until done. Remove and set aside.
Make the peanut soy sauce. Fry the bird's eye chilies and garlic cloves in a small amount of oil until lightly browned and fragrant. Remove from heat. Grind together with the roasted peanuts, no need for a completely smooth paste, a slightly coarse texture adds character. Pour in the warm water, lime juice, and sweet soy sauce. Stir until everything is well combined.
Serve. Arrange the fried tofu egg on a serving plate. Place the sliced cabbage and blanched bean sprouts alongside. Drizzle generously with the peanut soy sauce. Finish with crispy fried shallots and sliced celery on top. Serve immediately while warm.