Preheat your Griddle to medium heat for about 5 minutes. Apply a thin layer of oil to season the griddle as it is warming up.
Cook the chicken pieces in another part of the griddle. Season the chicken. Flip the chicken, halfway through cooking. On a different part of the griddle, add the shrimp pieces and season to taste. Flip each piece of shrimp, half way through cooking. Continue griddle cooking until fully done but not over cooked
Add the day-old rice onto the griddle and squirt some water to create moisture, add in thawed peas and carrots and let cook for about 5 minutes. Make a hole in the middle to cook the scrambled egg. Crack the egg into the middle and then break the egg yolk. Use your griddle spatula to scramble the egg by itself until just done.
Combine the scrambled egg, rice, salt and pepper. Cook for a few minutes and continue using the spatula to combine all the ingredients. Add the chicken and shrimp pieces to the rice mixture.
Sprinkle about a tablespoon or two of soy sauce over top of the fried rice mixture. Let the fried rice cook and get crispy bits mixed into it
Taste and adjust the seasoning if needed by adding more soy sauce, salt, and pepper.
When the desired flavor is achieved, remove from the griddle to a serving dish. Garnish with diced green onions and serve hot.