Preheat a small pan and add butter. Let it melt and scramble 2 eggs with a pinch of salt and set aside.
Combine soy sauce, oyster sauce, mirin, and sesame oil in a small bowl and set aside.
Preheat a large pan, add a splash of cooking oil and chicken. Cook chicken until golden brown on all sides. Transfer to a bowl and set aside.
Splash another bit of oil in the same pan, add carrots, onions, and season with some salt and pepper. Cook for about 5 minutes, stirring occasionally.
Add a pinch of chili flakes, and garlic. Cook for another minute.
Add peas and riced cauliflower and cook for 2 more minutes. Make sure everything is mixed well.
Add the chicken, eggs and soy sauce mixture. Mix and cook another 2 minutes, stirring constantly.
Remove from heat, and mix in the green onions.
Plate and serve.