Cut the chicken into bite-sized pieces.
Slice the onion, green onion, and carrot and prepare them.
Mix gochujang (Korean chili paste), soy sauce, minced garlic, sugar, and chili powder to make the marinade.
Add the marinade to the chicken and let it marinate for 10 minutes.
Heat cooking oil in a pan and stir-fry the chicken and vegetables.
Once the chicken is cooked through, place it on top of the rice.
Generously add mozzarella cheese on top and melt it using a microwave or torch.