Cut onion, potato, carrot, and beef into bite-sized pieces.
Heat cooking oil in a pan and stir-fry the onion.
Add the beef and stir-fry, then add the potato and carrot and continue to stir-fry.
Pour in water and bring to a boil until the ingredients are cooked.
Add curry powder, stir well, and cook until thickened.
Serve rice in a bowl and top with curry to finish.