Dice onion, potato, and carrot into cubes.
Cut beef or pork into bite-sized pieces.
Heat cooking oil in a pan and stir-fry the meat.
Once the meat is cooked, add the vegetables and stir-fry together.
When all the ingredients are sufficiently cooked, pour in water and bring to a boil.
Add curry powder and simmer over low heat while stirring.
When the curry thickens, serve it over rice.