Step 1: Preheat your Blackstone griddle to medium-high heat and apply a thin layer of vegetable oil across the surface.
Step 2: Place the diced chicken on one side of the griddle. Season with salt and pepper. Cook for 5-7 minutes, tossing occasionally, until golden brown and cooked through.
Step 3: On the other side of the griddle, sauté the onions, peas, and carrots in a little oil until the onions are translucent and the carrots are tender.
Step 4: Clear a space in the center, add the butter, and then spread the cold rice over it. Let the rice sit for 1-2 minutes without moving it to create a crispy texture.
Step 5: Pour the soy sauce and oyster sauce over the rice. Use your spatulas to toss the rice, breaking up any clumps and ensuring it is evenly coated.
Step 6: Push the rice mixture to the side and pour the beaten eggs onto the griddle. Scramble them quickly with your spatula.
Step 7: Combine the chicken, vegetables, rice, and eggs together. Drizzle with toasted sesame oil and garnish with sliced green onions before serving.