In a small bowl stir together the dark soy, soy, oyster sauce, and sesame oil, set aside.
In a large skillet over medium-high heat add 1/4th of the oil to the pan and add the beef, sear the steak getting a char on it, cooking it until just done, 3-5 minutes.
Place the beef on a plate and set aside.
Add 1/4th of the oil to the skillet and sauté the onion until softened and starting to brown, 2 minutes.
Add the peas and carrots, until slightly softened for 3 minutes.
Add the cooked veggies to the plate with the beef.
Add 1/4th of the oil to the pan and scramble the egg, stirring occasionally until cooked, about 1 minute, add to the plate with the beef and veggies.
Add the remaining oil to the pan and add the rice. Let it sit for about 2 minutes to get a slight char, stir it around and add the cooked beef, veggies, and egg back to the pan, stir to combine.
Add the sauce and stir to coat everything.
Continue to cook for about 3 more minutes so everything warms through and the flavors can blend.
Serve immediately with a garnish of optional scallions.
ENJOY!
