Place the beef strips in a bowl and toss with cornflour until evenly coated.
Heat half the oil in a large non-stick wok or skillet over high heat.
Add the beef strips in batches, frying until crispy and browned (about 3-4 minutes per batch). Remove beef and set aside on a plate.
Wipe the wok if necessary, add the remaining oil, and stir-fry the bell pepper and red chillies for 2 minutes.
Add the garlic and ginger to the wok and cook for 1 minute until fragrant.
In a small bowl, whisk together the soy sauce, rice vinegar, sweet chilli sauce, and honey.
Pour the sauce mixture into the wok and allow it to simmer for 1-2 minutes until it begins to thicken.
Return the crispy beef to the wok and toss rapidly to coat every strip in the glaze.
Serve the beef immediately over 125g of cooked rice per portion.
Garnish with sliced spring onions and sesame seeds.