In a large skillet, heat oil over medium-high heat. Add beef and cook until browned, about 5 minutes.

Add scallions and cook for an additional 2 minutes.

In a small bowl, whisk together soy sauce, oyster sauce, and sesame oil. Pour over beef mixture.

In a separate skillet, scramble the eggs.

Warm the tortillas in a dry skillet or microwave.

Divide the beef mixture and scrambled eggs evenly among the tortillas.

Roll up the tortillas and serve immediately.