01 - Whisk together the eggs, milk, salt, and white pepper in a large bowl until smooth and well combined.
02 - Add the bean sprouts, carrots, green onions, mushrooms, bell pepper, and chosen protein to the egg mixture. Stir thoroughly to distribute ingredients evenly.
03 - Heat 2–3 tablespoons of vegetable oil in a large nonstick skillet or wok over medium-high heat until shimmering.
04 - Scoop approximately 1/2 cup of the egg mixture into the hot pan for each patty, gently flattening to create even thickness. Fry 2–3 patties simultaneously depending on pan size.
05 - Fry each side for 2–3 minutes until golden brown and crispy edges form. Carefully flip and cook the opposite side until equally crisp. Transfer to a paper towel–lined plate. Repeat with remaining mixture, adding more oil as necessary.
06 - Combine chicken broth, soy sauce, oyster sauce (if using), sesame oil, and white pepper in a small saucepan. Bring to a gentle simmer over medium heat.
07 - Whisk cornstarch with cold water in a small bowl to create a smooth slurry. Stir into the simmering sauce and continue cooking for 1–2 minutes until thickened and glossy.
08 - Plate the crispy patties hot and ladle the savory gravy generously over each portion. Garnish with additional sliced green onions if desired.