Creating Crispy Chilli Beef Rice is easy if you follow these clear steps:

1. Prepare the Beef: In a bowl, combine the beef slices with soy sauce, oyster sauce, and rice vinegar. Allow to marinate for about 10 minutes.
2. Coat with Cornstarch: Dredge the marinated beef in cornstarch until evenly coated. This will create a crispy texture when cooked.
3. Heat Oil: In a large pan or wok, heat 2 tablespoons of vegetable oil over medium-high heat.
4. Fry the Beef: Add the beef to the hot oil, cooking until golden brown and crispy on all sides. This should take about 3-5 minutes. Remove and drain on paper towels.
5. Sauté Vegetables: In the same pan, add sliced onion and bell pepper. Stir-fry for about 2 minutes until slightly softened.
6. Add Aromatics: Stir in the minced garlic and ginger, cooking for 30 seconds or until fragrant.
7. Combine Sauce: In a small bowl, mix sweet chili sauce, soy sauce, and sesame oil. Pour this mixture into the pan and increase the heat for another minute.
8. Return Beef: Add the crispy beef back into the pan, tossing everything together until evenly coated in the sauce.
9. Serve with Rice: Spoon the mixture over a bed of cooked rice.
10. Garnish: Finally, garnish with chopped spring onions and sesame seeds.

By following these steps, you will master the art of creating Crispy Chilli Beef Rice, bringing vibrant flavors to your dining table!