Preheat Griddle: Set your Blackstone griddle to medium-low heat (approx. 350°F).
Cook Chicken: Add vegetable oil to the hot griddle. Place diced chicken on top and sauté, flipping occasionally, until fully cooked (4–6 minutes). Move to a cooler zone.
Sauté Veggies: Add the frozen peas and carrots to the hot zone. Cook for 3–5 minutes until soft. Move aside with chicken.
Scramble Eggs: Pour beaten eggs onto the griddle. Let them set, then scramble. Move to the side.
Fry Rice: Add cold rice to the griddle. Pour over sesame oil, soy sauce, salt, and pepper. Stir-fry for 3–4 minutes until crispy.
Combine Everything: Mix in the cooked chicken, vegetables, and eggs. Toss together until evenly coated and hot.
Serve Immediately: Garnish with green onions or sesame seeds, if desired.