Thinly slice the onions.
Cut the carrots and potatoes into bite-sized pieces.
Add cooking oil to a pan and sauté the onions until they turn brown.
Add the carrots and potatoes and stir-fry for 2 minutes.
Add minced garlic and ginger, sauté for 1 minute.
Mix in curry powder and tomato paste.
Pour in water and bring to a boil.
Season with salt and pepper to taste.
Simmer on low heat for 15 minutes.