At least 1 day before you plan to make the fried rice, place the rinsed rice in a heavy, medium-sized saucepan. Add 2 cups of cold water and salt, to taste. Bring to a boil over high heat. Cover, and cook at a gentle boil until the water has cooked down to the level of the rice. With a spoon (not a fork), stir the rice well. Cover, and reduce the heat to low. Continue to cook for about 15 minutes, or until the rice is tender. Fluff with a fork. Cool to room temperature before covering and refrigerating for 24 hours.
Break up any clumps of the cold rice with your fingers and set aside. In a small bowl, stir together the oyster sauce and soy sauce and set aside.
Coat a large, nonstick skillet with nonstick vegetable spray and set over medium-high heat. When the skillet is hot, add the eggs, swirling them around to make sure they coat the whole bottom of the pan. Cook, without stirring, and adjusting the heat as necessary, until the eggs are firm and cooked through but not yet starting to brown, lifting the skillet and tilting it so that the eggs cook evenly. Slide the eggs onto a plate and when they have cooled, cut into small pieces and set aside.
Return the skillet to the burner and heat the oil over high heat. When it is hot, add the peas and scallions, and cook, stirring constantly, until the scallions are limp, about 1 minute. Stir in the rice, sauce mixture, eggs and roast pork until well mixed. Continue to cook, stirring, until the rice is heated through, 1 to 2 minutes. Plate and drizzle with sesame oil, to taste.
Recipe courtesy of Wilson Eng, The New York Cabbie Cookbook, Running Press, 2003