Break up the cooked rice before starting. If using freshly cooked rice, spread it in a thin layer and let excess steam escape before cooking.
Beat the eggs in a small bowl and measure the soy sauce so everything is ready before the skillet heats.
Heat a large 12-inch skillet over medium-high to high heat. Add the neutral oil.
Add the onion, garlic and frozen peas and carrots. Stir-fry until hot and the excess moisture has cooked off.
Add the rice. Spread it across the skillet and break up remaining clumps with the edge of a spatula. Cook until the rice is hot and the surface looks relatively dry.
Push the rice to one side of the skillet. Add a small amount of oil to the empty space if needed, then pour in the beaten eggs.
Let the eggs begin to set, then scramble them into medium-sized curds. Cook until fully set.
Fold the egg into the rice and vegetables.
Pour the measured soy sauce around the rice rather than adding a large pool in one place. Toss until evenly distributed.
Turn off the heat. Stir in sesame oil, green onions and pepper. Serve immediately.