Cooking Instructions:
Start by marinating the thinly sliced flank steak in soy sauce and cornstarch. Mix well and let it sit for at least 30 minutes. This step helps to tenderize the meat and gives it a nice coating when fried.
Heat the vegetable oil in a deep pan or wok over medium-high heat. Once the oil is hot, carefully add the marinated beef in small batches to avoid overcrowding the pan. Fry the beef until golden brown and crispy, about 3-4 minutes. Remove and drain on paper towels.
In a separate pan, add a little oil if necessary, and sauté the minced garlic, ginger, and sliced red chillies until fragrant.
Add the sliced bell pepper to the pan and stir-fry for another 2-3 minutes until slightly softened.
In a bowl, mix together sugar, rice vinegar, sesame oil, salt, and pepper. Pour this mixture into the pan with the garlic, ginger, and bell pepper. Stir well to combine and let it simmer for a couple of minutes.
Finally, add the crispy beef to the pan and toss everything together until the beef is well coated with the sauce. Garnish with chopped spring onions before serving.
For best results, make certain that the oil is hot enough before frying the beef to achieve that crispy texture.
Also, feel free to adjust the level of spiciness by adding more or fewer chillies based on your preference. Enjoy your homemade Crispy Chilli Beef!