Start by making the sauce. Add all of the ingredients into a jug or a bowl and stir until it’s well combined.
Slice the beef against the grain into 1 cm strips. Pop it into a bowl and then add the soy sauce and cornflour. Mix well.
Heat some cooking oil over a high heat in a large frying pan or a wok. Tip the beef in and cook until it’s browned all over.
Remove it from the pan and set aside.
Add a little more oil to the pan, turn it down to a medium to high heat, and then stir fry the broccoli until it starts to soften.
Add in the garlic and ginger and cook for a further 30 seconds.
Give the sauce a stir, then pour it into the pan. Add the beef in too and stir well.
Cook for a couple of minutes, just until the sauce has thickened.
Serve with rice, then sprinkle over some sesame seeds. Enjoy.