Cut chicken and vegetables into bite-size pieces.
Heat cooking oil in a pan and sauté minced garlic.
Add the chicken and cook thoroughly.
Add vegetables like onion, carrot, and bell pepper and stir-fry together.
Add rice and mix well while stir-frying.
Season with ketchup, soy sauce, oyster sauce, and pepper.
Separately fry an egg for garnish.
Place the fried egg on top of the Nasi Goreng and serve.