1-First Step: Slice and coat the beef Start by placing the flank steak in the freezer for about 20 minutes. This makes it firmer and much easier to slice thinly. Cut the beef into thin 1/4-inch pieces, going against the grain so the meat stays tender after cooking. Once sliced, toss the beef with the cornstarch until each piece is lightly coated, then shake off any excess. Set it aside while you prepare the sauce.

2-Second Step: Cook the ginger and garlic Heat 2 teaspoons of vegetable oil in a 10-inch skillet over medium-low heat. Add the minced ginger and finely minced garlic, then stir them gently for about 1 minute until fragrant. Keep an eye on the pan because garlic can burn quickly if the heat is too high. You want the aromatics to smell warm and inviting, not bitter.

3-Third Step: Make the sauce Add the low-sodium soy sauce, water, and packed brown sugar to the skillet. Stir everything together and bring the mixture to a boil. Then lower the heat and simmer for 3 to 5 minutes, or until the sauce thickens slightly. When it looks glossy and a little syrupy, transfer it to a bowl and set it aside.

4-Fourth Step: Brown the beef in batches Heat 1 tablespoon of vegetable oil in a separate pan or wok over medium-high heat. Once the oil is hot, add the beef in small batches. Cook each batch for about 2 minutes, just until the pieces are browned but not fully cooked through. Remove the browned beef and repeat with the rest.

5-Fifth Step: Bring everything together Return the beef and the reserved sauce to the skillet. Heat over medium until everything is hot and bubbly. Stir gently so the sauce coats every piece of beef. This is the moment when the dish really starts to look like takeout-style Mongolian beef, with a glossy finish and rich color.

6-Final Step: Finish with green onions and serve Remove the pan from the heat and stir in the sliced green onions. Serve the Mongolian beef over steamed rice so the sauce has something to soak into. White rice, jasmine rice, or even brown rice all work well depending on what you prefer. If you want a fuller plate, add steamed broccoli, red bell pepper strips, or another simple vegetable on the side.