In a bowl, beat eggs and mix in meat, vegetables, and 1 teaspoon of soy sauce.
Heat 2 tablespoons oil in skillet over medium-high heat. Add 1/3 cup of batter and cook until browned on both sides. Repeat with remaining batter.
Place cooked pancakes on an oven-safe plate and keep warm in a low oven.
Mix cornstarch with water. In a saucepan, bring broth, sugar, vinegar, and remaining soy sauce to a boil. Stir in cornstarch slurry and cook until thickened.
Serve egg fu yung warm with sauce on top.
Notes
This recipe can be made with leftover meats or vegetarian by skipping the ham.