Steps
1. Heat the vegetable oil in a pan over medium-high heat.
2. Add the minced garlic and sauté for about 30 seconds until fragrant.
3. Add the sliced beef and cook for 2-3 minutes until browned.
4. Toss in the broccoli and bell pepper, stirring well.
5. Add the soy sauce, oyster sauce, salt, and pepper, and cook for another 3-4 minutes until the vegetables are tender-crisp.
6. Serve hot over cooked rice if desired.