Creating Chinese Beef and Broccoli can be accomplished by following these simple steps:

1. Marinate the Beef: In a bowl, combine the sliced beef with 2 tablespoons of soy sauce and 1 tablespoon of cornstarch. Mix well and let it marinate for about 10 minutes.
2. Prepare the Broccoli: While the beef is marinating, rinse the broccoli florets and set aside.
3. Heat the Oil: In a large skillet or wok, heat 2 tablespoons of vegetable oil over medium-high heat.
4. Cook the Beef: Add the marinated beef to the skillet in a single layer. Cook for 2-3 minutes until browned, stirring occasionally. Remove the beef from the skillet and set aside.
5. Sauté Garlic: In the same skillet, add the minced garlic and cook for about 30 seconds until fragrant.
6. Add Broccoli: Toss in the broccoli florets and stir-fry for approximately 5 minutes until bright green and just tender.
7. Combine Beef and Sauce: Return the cooked beef to the skillet. Add 1 tablespoon of oyster sauce and the remaining soy sauce. Stir everything together so the sauce coats the meat and broccoli.
8. Thicken the Sauce: If you prefer a thicker sauce, make a slurry by combining 1 teaspoon of cornstarch with 2 tablespoons of water. Pour it into the skillet and stir until the sauce thickens.
9. Serve: Remove from heat and serve hot over steamed rice or noodles.