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Place the sliced beef in a medium bowl. Add salt, MSG, garlic powder, baking soda, potato starch, dark soy sauce, and 1 tablespoon of vegetable oil. Mix thoroughly by hand until the beef is well-coated. Cover and refrigerate for 20 minutes to marinate.

While the beef marinates, prepare the onions. Slice off the root and top ends of each onion, then cut in half. Peel off the outer papery layers. Slice each onion half into crescent-shaped pieces.

Heat a large pan or wok over high heat. Add 3 tablespoons of vegetable oil and heat until it is as hot as possible, just shimmering.

Add the marinated beef to the hot oil. Spread it out in a single layer if possible to allow it to brown. Stir occasionally until the beef is nicely browned.

Add the sliced onions to the pan with the beef. Sprinkle with 1/4 teaspoon salt and 1/4 teaspoon MSG. Stir-fry, frying off the MSG, until the onions just begin to soften, about 2-3 minutes.

Add the dark soy sauce, light soy sauce, and granulated sugar to the pan. Continue to stir-fry on high heat, continuously stirring, until the liquid from the soy sauce has cooked off. If a saucier dish is desired, add 1/4 cup of water and bring to a simmer, then stir in the potato starch slurry (1 teaspoon potato starch mixed with 2 tablespoons water) and cook until thickened.

Transfer the finished Beef and Onion Stir-fry from the pan into a serving dish or takeaway-style container. Serve immediately.


Place the sliced beef in a medium bowl. Add salt, MSG, garlic powder, baking soda, potato starch, dark soy sauce, and 1 tablespoon of vegetable oil. Mix thoroughly by hand until the beef is well-coated. Cover and refrigerate for 20 minutes to marinate.

While the beef marinates, prepare the onions. Slice off the root and top ends of each onion, then cut in half. Peel off the outer papery layers. Slice each onion half into crescent-shaped pieces.

Heat a large pan or wok over high heat. Add 3 tablespoons of vegetable oil and heat until it is as hot as possible, just shimmering.

Add the marinated beef to the hot oil. Spread it out in a single layer if possible to allow it to brown. Stir occasionally until the beef is nicely browned.

Add the sliced onions to the pan with the beef. Sprinkle with 1/4 teaspoon salt and 1/4 teaspoon MSG. Stir-fry, frying off the MSG, until the onions just begin to soften, about 2-3 minutes.

Add the dark soy sauce, light soy sauce, and granulated sugar to the pan. Continue to stir-fry on high heat, continuously stirring, until the liquid from the soy sauce has cooked off. If a saucier dish is desired, add 1/4 cup of water and bring to a simmer, then stir in the potato starch slurry (1 teaspoon potato starch mixed with 2 tablespoons water) and cook until thickened.

Transfer the finished Beef and Onion Stir-fry from the pan into a serving dish or takeaway-style container. Serve immediately.
