Cut up all the vegetables, and make sure any frozen vegetables have been fully thawed.
Heat 2 teaspoons of canola oil (or other neutral-tasting oil) over medium-high heat, in a large skillet or frying pan.
Add the chopped onions and mushrooms to the hot skillet and cook the onions for a couple of minutes until they start to soften.
When the onions have turned translucent, add the minced garlic and stir it around for about 30 seconds, until the garlic starts to turn fragrant.
Add the scallions, peas and carrots, or any other vegetables you want to add.
Add 1 tablespoon of Shaoxing wine to deglaze the pan, and scrape up any browned bits that've stuck to the bottom of the pan.
Add the cooked rice and stir it around until heated through.
Stir in 2 teaspoons of soy sauce, ½ teaspoon of dark soy sauce (if you have it on hand), and ½ teaspoon of sesame oil, and stir into the rice-and-vegetable mixture.
Stir in the pork pieces and omelet pieces.