Heat the oil in a large, deep skillet or wok (preferably nonstick) over medium-high heat. When the oil is hot but not smoking, add the ground beef and salt.
Stir to combine and arrange the beef in a single layer. Cook undisturbed for 3-4 minutes.
Stir, breaking up any large pieces. Continue cooking for another 4-6 minutes, or until fully browned, stirring occasionally.
Depending on the fat content of your ground beef, you may want to drain the excess fat. Remove the skillet from the heat, push the beef to one side, and tilt the pan so the fat pools on the opposite side. Use a large spoon to scoop it out into a bowl or can. Discard or save for another use.
Lower the heat to medium-low and pour in the prepared stir fry sauce. Stir well to coat the beef.
Cover the skillet and cook for 4-6 minutes, stirring occasionally, until the sauce thickens and the flavors meld. If it gets too thick, add 1-2 tablespoons of water.
Stir in the sliced green onions.
Taste and add salt if needed. As a reference, we did not add extra to ours.
Serve with white rice or noodles and broccoli or your vegetable of choice. Garnish with extra green onions and sesame seeds, if desired.