01 - Whisk together eggs, milk, salt, and white pepper in a large bowl until smooth and fully incorporated.
02 - Add bean sprouts, carrots, green onions, mushrooms, bell pepper, and chosen protein to egg mixture. Stir until evenly distributed.
03 - Heat 2-3 tablespoons vegetable oil in a large nonstick skillet or wok over medium-high heat until shimmering.
04 - Scoop approximately 1/2 cup egg mixture per patty into hot pan, flattening gently with spatula. Fry 2-3 patties at a time, cooking 2-3 minutes per side until golden brown and crispy. Transfer to paper towel-lined plate.
05 - Repeat with remaining mixture, adding more oil as needed to maintain proper frying conditions.
06 - Combine chicken broth, soy sauce, oyster sauce, sesame oil, and white pepper in small saucepan. Bring to simmer over medium heat.
07 - Mix cornstarch with cold water in small bowl to form slurry. Stir into simmering sauce and cook 1-2 minutes until thickened and glossy.
08 - Arrange hot patties on serving plates and drizzle generously with savory gravy.