Cut the chicken, potatoes, carrots, and onions into bite-sized pieces.
In a microwave-safe container, add the prepared ingredients along with soy sauce, sugar, minced garlic, sesame oil, pepper, and water. Mix well.
Cover the container with plastic wrap or a lid and microwave for 10 to 15 minutes.
Take it out once during cooking, stir well, and microwave for another 5 minutes.
Once the chicken is cooked, take it out, sprinkle with sesame seeds and chopped scallions, and serve.