Measure and prep everything first (mise en place). Slice beef into 1/4–1/2" strips against the grain if not already sliced, grate the ginger, mince the garlic, and cut broccoli into even florets. Having everything ready lets you cook quickly on high heat — stir‑fries succeed or fail in minutes.

Season the beef lightly with a pinch of salt and a few grinds of pepper. If you like, toss the beef with 1/2 tsp soy sauce and let it sit 5–10 minutes — this gives the surface a touch of seasoning and helps caramelize faster when it hits the pan.

Make the sauce: in a small bowl combine the remaining 1.5 tbsp soy sauce, grated ginger, minced garlic, and the sesame oil. If you want a slightly thicker, glossy sauce, whisk the cornstarch with 2 tbsp water until smooth and set aside. Pre-mixing the sauce ensures even seasoning and allows immediate finishing at the end of cooking.

Blanch the broccoli (optional but recommended for bright color and uniform tenderness): bring a medium pot of salted water to a rolling boil, add the broccoli and cook 45–60 seconds until bright green and just tender. Immediately transfer to an ice bath (or cold running water) to stop cooking. Drain and set aside. Blanching ensures the broccoli will be crisp‑tender and keeps the stir‑fry quick.

Heat a large wok or heavy skillet over high heat until very hot (about 2–3 minutes). Add the neutral oil and swirl to coat. High heat is essential to get a quick sear on the beef without stewing it — that smoky, savory crust (Maillard reaction) is flavor gold.

Add the beef in a single layer, leaving space between strips. Do not overcrowd; sear in two quick batches if needed. Cook undisturbed 60–90 seconds to develop color, then toss and cook another 30–60 seconds until just medium-rare to medium (internal temperature ~130–140°F / 54–60°C). Remove beef to a plate. Searing rather than continuously stirring gives concentrated flavor and prevents meat from steaming.

Return the pan to high heat. If needed, add a tiny splash more oil. Add the blanched broccoli and toss 30–45 seconds to reheat and coat with pan juices. This brief high‑heat toss warms the broccoli without overcooking it; you want crisp‑tender texture.

Lower the heat to medium-high and push broccoli to the side. Add the prepared sauce mixture to the empty space and let it sizzle for 10–15 seconds to bloom the garlic and ginger and marry flavors. Then combine with the broccoli and return the beef and any collected juices to the pan. Blooming spices releases aromatic oils and deepens the sauce flavor.

If using the cornstarch slurry, give it a final whisk and pour into the pan now, stirring constantly until the sauce thickens and becomes glossy — about 30 seconds. Taste and adjust seasoning with a pinch of salt or a dash more soy if needed. The slurry gives the sauce a silky sheen that clings to the beef and broccoli.

Finish with a quick drizzle (if desired) of additional sesame oil for aroma, toss once more, then remove from the heat. Serve immediately over warm brown rice so the grains remain fluffy and separate. Resting the beef even briefly lets juices redistribute; serving at once preserves the contrast of textures.

Portion the cooked brown rice between two plates, spoon the beef and broccoli on top, and ladle a little extra sauce over each serving. Garnish ideas (optional): toasted sesame seeds, sliced scallions, or a few red pepper flakes for heat.