Creating Crispy Sweet Chilli Beef is straightforward when you follow these simple steps:

1. Prepare the Beef: Thinly slice the beef sirloin against the grain. This ensures tenderness.
2. Make the Batter: In a bowl, combine cornstarch, flour, baking powder, salt, and black pepper. Mix well.
3. Beat the Eggs: In another bowl, whisk the eggs until frothy.
4. Coat the Beef: Dip each beef slice into the egg, then dredge it in the flour mixture until well coated.
5. Heat the Oil: In a large frying pan or wok, heat oil over medium-high heat. You want enough oil to submerge the beef slices.
6. Fry the Beef: Fry the coated beef slices in batches until golden brown and crispy, about 3-4 minutes per side. Remove and drain on paper towels.
7. Prepare the Sauce: In a separate saucepan, combine sweet chili sauce, soy sauce, rice vinegar, and sesame oil. Heat over medium heat until warmed through.
8. Toss the Beef: In a large bowl, add the crispy beef and pour the sauce over it. Toss gently to coat all pieces evenly.
9. Garnish: Transfer to a serving platter and sprinkle with chopped green onions and sesame seeds for an extra touch.
10. Serve Immediately: Enjoy your Crispy Sweet Chilli Beef while it’s hot and crispy.

By following these steps, you’ll create an incredible dish that’s full of flavor and texture, sure to impress anyone at your table.