01 - Whisk together eggs, milk, salt, and white pepper in a large bowl until smooth and well combined.
02 - Add bean sprouts, carrots, green onions, mushrooms, bell pepper, and diced protein to the egg mixture. Stir thoroughly to distribute all ingredients evenly.
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 of the egg mixture into the hot pan for each patty. Gently flatten to create even thickness. Fry 2–3 patties at a time depending on pan size.
05 - Cook each side for 2–3 minutes until golden brown and crispy edges form. Flip carefully with a spatula and finish cooking the opposite side. Transfer to 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 until smooth to create a slurry. Pour into the simmering sauce while stirring constantly. Continue cooking for 1–2 minutes until the gravy reaches desired consistency.
08 - Place hot Egg Foo Young patties on serving plates. Generously drizzle with the prepared gravy. Serve immediately while crispy and hot.