Creating your own Crispy Chilli Beef can be straightforward if you follow these simple steps:

1. Prepare the Beef: Slice the beef into thin strips against the grain, about 1/4 inch thick.
2. Marinate: In a bowl, mix the beef with a pinch of salt and pepper. Let it marinate for 10 minutes.
3. Coat the Beef: Dredge the marinated beef strips in cornstarch, ensuring they are evenly coated for extra crispiness.
4. Heat the Oil: In a large skillet or wok, heat vegetable oil over medium-high heat.
5. Fry the Beef: Carefully add the coated beef strips to the hot oil, frying in batches until golden brown and crispy (about 2-3 minutes per batch). Remove and drain on paper towels.
6. Stir-Fry the Vegetables: In the same skillet, add sliced bell peppers, garlic, ginger, and dried red chillies. Stir-fry for 2-3 minutes until the vegetables are tender-crisp.
7. Make the Sauce: In a bowl, combine soy sauce, oyster sauce, sugar, and vinegar. Stir well to create a smooth sauce.
8. Combine: Add the crispy beef back into the skillet with the vegetables. Pour the sauce over the mixture and toss to coat evenly.
9. Finish with Green Onions: Add chopped green onions and stir for an additional minute to heat through.
10. Serve: Remove from heat and serve immediately.

By following these steps, you’ll create an incredible dish that captures the essence of Crispy Chilli Beef!