Cut the chicken into bite-sized pieces.
Dice the potatoes, carrots, and onions.
Heat cooking oil in a pan and sauté the chicken.
Once the chicken is cooked, add the vegetables and stir-fry together.
Add soy sauce, sugar, minced garlic, pepper, and water.
Simmer over medium heat until the chicken and vegetables are cooked through.
Add green onions at the end and bring to a boil one last time.