Chewy lo mein noodles, tender beef, and crisp vegetables are tossed in a savory sauce. This easy beef lo mein recipe comes together in one pan in 30 minutes. It's a quick homemade alternative to Chinese takeout with plenty of flavor and texture.
Thinly slice flank steak against the grain on a 45-degree angle into ¼-inch pieces. Transfer to a bowl, toss with the marinade ingredients, and let marinate for 15-20 minutes.
In a small bowl, whisk together all the listed sauce ingredients until the sugar fully dissolves. Set aside.
Fill a wok or large pan with enough water to cover the noodles and bring to a boil. Add the noodles and blanch just until loosened, about 30 seconds. Drain, rinse under cold water, shake off excess moisture, and toss with 1 teaspoon vegetable oil to prevent sticking. Set aside.
Heat vegetable oil in a large pan over medium-high heat. Sear the beef for 2-3 minutes until just cooked through with lightly browned edges. Remove and set aside.
Add the carrots, red bell pepper, cabbage, and water to the pan. Stir-fry until crisp-tender, about 1 minute.
Add the noodles. Whisk the sauce again, pour it over the noodles, and stir-fry until the sauce coats the noodles. Return the beef to the pan with the green onions and toss to combine. Remove from heat and serve immediately.
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