Shaking beef (bo luc lac) is a classic Vietnamese recipe is made with wok-seared sweet and savory beef, sliced tomatoes, pickled onions and a tangy lime dipping sauce.
Place beef cubes in a large resealable plastic bag and add next 4 ingredients (garlic through fish sauce). Toss well to coat and marinade for 30 minutes or up to overnight.
Heat a large wok or frying pan over high heat and spray with cooking spray. Saute beef until browned, about 5-7 minutes. Remove fro pan and let rest 5-10 minutes.
While beef is cooking, pickle the red onions by tossing the slices with lime juice and salt; set aside.
Prepare the dipping sauce by whisking together the lime juice with salt and pepper; set aside.
To serve, place the beef, cucumber and tomato slices on a large platter and top with pickled onions. Serve with lime dipping sauce.