Cook the beef: Heat oil in a large skillet over high heat. Add ground beef and cook, breaking it up with a spoon, until browned (about 3-4 minutes). No need to drain if using lean beef.
Add broccoli and aromatics: Add broccoli florets, garlic, and ginger. Stir-fry for 2 minutes until broccoli turns bright green and slightly tender (if using frozen, cook 1 minute longer).
Pour in the sauce: Give the whisked sauce a quick stir, then pour it over the beef and broccoli. Stir everything together. The sauce will start bubbling and thickening immediately.
Let it thicken: Cook for 1-2 more minutes until the sauce coats the back of a spoon. If it becomes too thick, add a splash of broth or water.
Serve: Serve hot over steamed rice, cauliflower rice, or noodles. Garnish with sesame seeds and sliced green onions if desired.
Keyword 15-minute dinner, Asian ground beef, beef and broccoli stir-fry, easy weeknight dinner, ground beef and broccoli, healthy stir-fry, high protein dinner, low carb dinner, one-pan beef and broccoli, quick beef recipe