Cut the onion, potato, carrot, and pork into bite-sized pieces.
Heat cooking oil in a pan and sauté the onions.
Add pork and stir-fry until the color changes.
Add potatoes and carrots, and stir-fry together.
Pour in water and boil until the ingredients are cooked.
Turn off the heat and add curry powder, mixing well until dissolved.
Simmer over medium heat for another 5 minutes until thickened.