To prep, cut the beef into thin slices against the grain. Cut the broccoli into small pieces. Mix the marinade, if you’re making a fresh batch.
Heat a large skillet over medium high heat. Add 1 tablespoon of oil.
Once oil is shimmering, add beef slices and cook for about 3 minutes, stirring occasionally. Transfer into a clean plate.
Add remaining tablespoon of oil and heat it.
Add broccoli florets and carrots and cook for about 4 minutes, or until nice and tender.
Pour in stir-fry sauce and add beef slices. Bring it to a boil and cook for another minute or 2 minutes, or until sauce if thickened.
Serve over hot rice with sesame seeds and/or green onions.