Preparation is key. Ensure your cooked rice is fully chilled. Have your vegetables, beaten eggs, butter, and sauces pre-measured and right next to the griddle.
Preheat your Blackstone griddle to medium-high heat.
Drizzle the vegetable oil onto the hot surface. Add the diced onions and the thawed peas and carrots. Sauté for about 3-4 minutes until the onions are soft and translucent. Move them to a slightly cooler zone.
Melt 1 tablespoon of butter in the center of the griddle. Pour the beaten eggs directly onto the butter and scramble them quickly with your spatulas. Chop them into small pieces and mix them into the vegetables.
Spread the chilled rice out onto the hot griddle. Use your spatulas to chop up any large clumps of rice, spreading it into a thin, even layer. Let it sizzle undisturbed for about 1 minute to get a slight crispness.
Mix the vegetable and egg blend into the rice. Add the remaining 2 tablespoons of butter and pour the soy sauce evenly over the mixture.
Now use the space! Aggressively toss, chop, and turn the rice using two spatulas, ensuring every grain is coated in the soy sauce and butter. Cook for another 2-3 minutes.
Turn off the burners. Drizzle the toasted sesame oil over the rice and season with black pepper. Toss it one final time to incorporate the aroma.
Remove from the griddle immediately, garnish with fresh green onions, and serve hot!