Cut the tofu into bite-sized cubes.
Clean and finely chop the onion, carrot, and potato.
Add cooking oil to a pan and sauté the onion until fragrant.
Add the carrot and potato, and stir-fry together.
Add the tofu and cook until lightly golden.
Add curry powder and water, mixing well.
Simmer until all ingredients are cooked through.
Season with salt and pepper to taste.
Serve in a bowl to finish.