Dice the onion, potato, and carrot.
Cut the beef into bite-sized pieces.
Heat oil in a pan and stir-fry the beef.
Add the onion, potato, and carrot and stir-fry together.
Pour in 300ml of water and bring to a boil.
Once the ingredients are cooked, lower the heat and add curry powder.
Simmer, stirring, until thickened.
Serve the curry over rice to finish.