Toss everything together to evenly coat, then transfer to the air fryer basket once it's preheated.
Air fry for 6-8 minutes, tossing once halfway through cooking. The steak bites should be browned with a bit of a golden crust.
Rest the steak bites for 2-3 minutes on a warm plate and then serve.
Notes
To make the charred peppers and greens beans for the rice bowl version
1/2 red bell pepper, chopped into chunky pieces
1/2 yellow bell pepper,, chopped into chunky pieces
60g (1 1/4 oz) green beans, chopped into 1" pieces
Place the vegetables in the air fryer basket and toss with 1/4 tsp each of salt and pepper. Spray with 10 squirts of spray oil an air fry at 200C/400F for 5 mins.
Type of steak to use
I like to use ribeye or sirloin steak if it's on offer, as that gives the juiciest, most tender steak bites. You can use beef medallions too, for a cheaper option in the UK. If you're in the USA, strip steak, top sirloin and tenderloin tips (you may have to ask your butcher for tenderloin tips) are great too. Basically you're looking for a chunky steak, ideally a little marbled, that's suitable for quick cooking. We don't want to use stewing/casserole steak or cuts that are chewy unless slow cooked.