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.
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. 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.
