Step 1 Combine the oil, chilli, garlic, lemon zest and lemon juice in a small bowl. Place the beef in a shallow glass or ceramic dish. Pour half the oil mixture over the beef and turn to coat. Season.
Step 2 Heat a greased barbecue grill or chargrill over medium-high heat. Cook the beef for 4 mins each side or until cooked to your liking. Transfer to a plate. Cover with foil and set aside for 5 mins to rest. Thinly slice.
Step 3 Meanwhile, heat the remaining oil mixture in a large frying pan over high heat. Add the tomato and cook for 2 mins or until heated through. Add the cauliflower rice, spinach, spring onion and snow peas and cook, stirring, for 4 mins or until heated through. Season.
Step 4 Divide the cauliflower rice mixture among serving plates. Top with the beef to serve.
