Freeze beef for 30 minutes – 1 hour for easier slicing. Slice against the grain, into very thin strips. Toss the beef strips with a generous pinch of coarse salt and let it rest while you prep everything else. (All of this is optional but recommended for flavor and texture.)
Whisk the sauce ingredients together.
Cook your rice according to package directions.
Heat a large heavy skillet over medium heat. Add a swish of oil. Working in batches, add the beef in a single layer. Let rest, undisturbed, for a minute or two to achieve a nice browning on the meat. Flip each piece over and cook until browned and yummy. Remove beef from pan.
Add a swish of oil to the same pan. Add the broccoli; stir fry for 2-3 minutes, until bright green. (Sometimes I add a splash of water to steam it a little bit.) Remove broccoli from pan.
Turn the heat down and let the pan cool a bit. Add one last swish of oil. Add the ginger and garlic; sauté for 1-2 minutes. Add the sauce; stir until a thickened and sticky sauce forms. Add beef and broccoli back in. Toss gently to coat.
Serve with rice, thinly sliced green onions, and sesame seeds.
