Steps
1. In a bowl, beat the egg with soy sauce, sesame oil, chopped scallions, salt, and pepper.
2. Heat vegetable oil in a non-stick pan over medium heat.
3. Pour the egg mixture into the pan, spreading evenly to form a thin pancake.
4. Cook for 2-3 minutes until edges are set, then flip and cook the other side for 1-2 minutes.
5. Toast the sandwich bread slices until golden.
6. Spread hoisin sauce evenly on one side of each toasted bread slice.
7. Place the cooked egg pancake on one bread slice.
8. Add cucumber slices and lettuce leaves on top of the egg pancake.
9. Cover with the other slice of bread, press gently, and cut the sandwich in half.
10. Serve warm and enjoy your Chinese-style egg and veggie sandwich.