Cut the chicken into bite-sized pieces.
Prepare potatoes, carrots, and onions, then cut them into large chunks.
Heat oil in a pan and stir-fry the chicken.
When the chicken is half-cooked, add the vegetables and stir-fry together.
Add soy sauce, sugar, minced garlic, and water, then bring to a boil.
Cover and simmer on medium heat for 20 minutes.
When the sauce thickens and reduces, it's ready.