Bò lúc lắc: shaking beef

Shaking beef, or bò lúc lắc, is a Vietnamese dish of bite-size beef cubes seared over high heat and tossed in the pan until browned outside and juicy inside. The name comes from that motion: lúc lắc (look lahk) means shaking or rocking, and bò means beef.

It's usually served over watercress or lettuce with tomatoes and onions, plus a small dish of lime, salt and pepper for dipping. You'll find it with rice, and on some menus with French fries or bread, a nod to the French influence on Vietnamese cooking.

What makes shaking beef work

The whole dish depends on a hot pan and a short cook. Three things matter most:

• Cut: use a tender cut that stays soft with quick cooking, like sirloin, tri-tip, ribeye or tenderloin.
• Dry beef: pat the cubes dry so they sear instead of steaming.
• Small batches: crowding the pan drops the heat. Cook in two or three rounds.

Ingredients (serves 3 to 4)

For the beef:

• 1½ lb (about 680 g) sirloin or ribeye, cut into 1-inch (2.5 cm) cubes
• 1 tablespoon oyster sauce
• 1 tablespoon soy sauce
• 1 teaspoon fish sauce
• 2 teaspoons sugar
• 4 cloves garlic, minced
• 1 teaspoon freshly ground black pepper

For the pan:

• 2 tablespoons neutral oil, plus more as needed
• 1 tablespoon butter (optional, for gloss)
• 1 small red onion, cut into wedges
• 1 bell pepper, cut into 1-inch pieces (optional)
• 2 green onions, cut into 2-inch lengths

To serve:

• 1 bunch watercress or a few handfuls of lettuce
• 1 to 2 tomatoes, sliced
• Steamed jasmine rice
• Dip: juice of 1 lime, ½ teaspoon salt, ½ teaspoon black pepper

Allergens: oyster sauce contains shellfish, soy sauce contains soy (and often wheat), and fish sauce is made from fish. Butter adds dairy. Swap or skip as needed.

Steps

1. Marinate the beef. In a bowl, combine the oyster sauce, soy sauce, fish sauce, sugar, half the garlic and the pepper. Add the beef and toss to coat. Let it sit 30 minutes at room temperature, or up to a few hours in the fridge.

1. Prep the plate. While the beef marinates, spread the watercress on a platter and arrange the tomato slices around it. Mix the lime juice, salt and pepper in a small dish.

1. Heat the pan. Set a large cast-iron skillet or wok over high heat until it just starts to smoke. Add 1 tablespoon oil and swirl.

1. Sear the first batch. Blot the beef cubes lightly with a paper towel and add a single layer to the pan, leaving space between pieces. Leave them untouched for about 1 minute to brown.

1. Shake. Toss the pan, or turn the cubes with tongs, and cook another 1 to 2 minutes for medium-rare. Move the beef to a plate and repeat with the rest, adding oil as needed.

1. Cook the vegetables. Lower the heat to medium-high. Add the onion, bell pepper and remaining garlic and stir-fry 1 to 2 minutes until just softened.

1. Bring it together. Return the beef and its juices to the pan, add the butter and green onions, and toss for 30 seconds until glossy.

1. Serve. Pile the beef over the watercress so the greens wilt slightly from the heat. Serve with rice and the lime-pepper dip on the side.

The lime, salt and pepper dip

That little dish of muối tiêu chanh (salt, pepper, lime) makes the dish taste finished. Each bite of beef gets a quick dip, and the sharp lime cuts through the rich, slightly sweet glaze. Some cooks add a pinch of sugar or a little minced chili. Mix it right before serving so the salt doesn't fully dissolve; a slightly gritty texture is part of the appeal.

Tips and swaps

• Want it more tender? Some cooks add a small pinch of baking soda to the marinade. Use very little, or the texture turns spongy.
• No watercress? Butter lettuce, romaine or arugula all work.
• Doneness: cubes this size go from medium-rare to well-done fast. Pull them a bit early, since they keep cooking on the plate.
• Round out the meal: pair it with a light soup like canh chua, or set out nước chấm for anyone who prefers a sweeter dip.

Rice, fries or bread?

Rice is the most common partner at home. Some restaurants pair the beef with red tomato fried rice (cơm đỏ), and others serve fries or a crusty baguette, which are good for soaking up the pan juices. All three are traditional enough that you can choose whatever suits your table.

Doubling the recipe

Shaking beef scales well, but your pan doesn't. If you're cooking for six or more, sear the beef in more batches rather than bigger ones, keep the cooked cubes on a warm plate, and do the final toss with butter and onions in two rounds. It adds a few minutes but keeps every piece seared.

Get your pan hotter than you think you need before the first cube goes in; that sear is the whole point of shaking beef.