Preparation :
1- In a small bowl stir together the dark soy, soy, oyster sauce, and sesame oil, set aside.
2- 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.
3- Place the beef on a plate and set aside
4- Add 1/4th of the oil to the skillet and sauté the onion until softened and starting to brown, 2 minutes.
5- Add the peas and carrots, until slightly softened for 3 minutes.
6- Add the cooked veggies to the plate with the beef.
7- 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.
8- 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.
9- Add the sauce and stir to coat everything.
10- Continue to cook for about 3 more minutes so everything warms through and the flavors can blend.
Enjoy