Steps
1. Heat vegetable oil in a large skillet or wok over medium-high heat.
2. Add garlic and ginger; sauté for 30 seconds until fragrant.
3. Add beef slices, season with salt and pepper, and stir-fry until browned, about 3-4 minutes.
4. Add onion, broccoli, red bell pepper, and carrots; stir-fry for 4-5 minutes until vegetables are tender-crisp.
5. Pour soy sauce over the mixture and toss to coat evenly.
6. Cook for another 1-2 minutes, ensuring everything is well combined and heated through.
7. Serve immediately, sprinkled with sesame seeds if desired.