Heat 1 tbsp oil in a skillet over med-high, pat dry beef, add to pan in one layer + sear 2 min (for well done add 1 min); flip + cook 1 more min, season with salt/pep; remove beef + reserve pan juices

Heat 1 tbsp oil in same skillet over med-high; add broccoli, salt/pep + sauté 4-5 min until lightly browned; add 2 tbsp water, reduce heat, cover + steam 3-5 min more until tender; add beef + 4-6 tbsp then toss to combine; warm 1-2 min until hot

Divide beef teriyaki to plates