01 - Whisk together eggs, milk, salt, and white pepper in 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 large nonstick skillet or wok over medium-high heat until shimmering.
04 - Scoop approximately 1/2 cup egg mixture per patty into hot pan. Gently flatten to even thickness. Cook 2-3 patties simultaneously based on pan size.
05 - Cook each side 2-3 minutes until golden brown and crispy edges form. Flip carefully with spatula. Transfer to paper towel-lined plate. Repeat with remaining mixture, adding oil as needed.
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 create smooth slurry. Stir into simmering sauce. Continue cooking 1-2 minutes until gravy thickens to desired consistency.
08 - Plate hot Egg Foo Young patties and drizzle generously with prepared gravy. Serve immediately while crispy.