Bò Lúc Lắc (Vietnamese Shaking Beef)

Method

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1. 1Toss the beef with the oyster sauce, soy sauce, fish sauce, sugar, pepper and half the garlic. Leave at room temperature for 30 minutes.
2. 2Spread the watercress and tomato slices on a serving platter. Mix the salt and pepper in a small dish and set lime wedges beside it.
3. 3Heat a large pan or wok over high heat until smoking and add 1 tbsp oil. Add half the beef in a single layer and sear for 1 minute without touching it.
4. 4Shake the pan to turn the cubes and cook for 1-2 minutes more, until browned outside and still pink inside, then transfer to a plate. Repeat with the remaining oil and beef.
5. 5In the same pan, toss the onion and bell pepper for 1-2 minutes until lightly charred but still crisp. Add the butter and remaining garlic and stir for 30 seconds until fragrant.
6. 6Return the beef and its juices to the pan and shake for 30 seconds to coat. Tip it straight onto the greens.
7. 7Squeeze lime over the salt and pepper, stir, and dip each bite into it. Serve with rice or fries.