Cut the chicken into bite-sized pieces.
Dice the potatoes, carrots, and onions.
Heat cooking oil in a pot and sauté the chicken.
When the chicken turns white, add the potatoes, carrots, and onions, and stir-fry.
Add chili powder, soy sauce, minced garlic, sugar, pepper, and water.
Bring to a boil over high heat, then reduce to medium heat and simmer for about 20 minutes.
Finish when all ingredients are cooked and the sauce has thickened.