Sauce: Mix Firecracker sauce ingredients in a small bowl and set aside.
Cook beef: Heat oil in a large frypan over high heat. Add beef and cook, breaking it up as you go, until you can no longer see raw meat (2½ minutes). Add garlic and chilli flakes and cook for 1 minute.
Caramelise beef: Add Firecracker sauce ingredients, stir to coat the beef. Cook for 5 to 7 minutes, stirring only every minute or so initially, then more towards the end, until the sauce reduces and you can see the beef caramelising. Caramelise well for good flavour!
Water: Add the water to desired thickness and cook for 1 minute (the water makes the beef saucier!)
Serve over rice, sprinkled with sesame seeds, green onion and a squirt of extra sriracha if you're feeling brave! Add a pile of vegetables of choice on the side. Dive in!
