Sweet-savory Mongolian beef with a glossy garlic-ginger soy glaze and crispy edges—ready in 30 minutes. Perfect over fluffy white rice for a quick weeknight dinner.
Pat steak slices dry. Toss with cornstarch until evenly coated and let sit 10 minutes while you make the sauce.
Whisk soy sauce, water, brown sugar, garlic, ginger, and red pepper flakes in a bowl until the sugar dissolves.
Heat vegetable oil in a large skillet over medium-high heat. Sear beef in batches, spreading in a single layer, until browned and crisp at the edges, about 1 to 2 minutes per side. Transfer to a plate and repeat with remaining beef.
Discard excess oil, leaving about 1 tablespoon in the pan. Pour in the sauce and bring to a simmer; cook 2 to 3 minutes until glossy and slightly thickened.
Return beef and any juices to the pan; toss to coat. Stir in green onions and sesame oil; cook 1 minute to soften.
Garnish with sesame seeds and serve hot over cooked white rice.
Notes
For a less sweet sauce, use 0.33 cup brown sugar. To keep it gluten-free, substitute tamari for soy sauce. Skirt steak also works well; slice thinly and sear quickly for tender results.