Start by preparing all your ingredients. If you haven't done so already, cook the rice in advance and refrigerate it for at least a few hours or overnight to dry it out slightly.
In a large skillet or wok, heat 1 tablespoon of vegetable oil over medium-high heat. Add the pork slices and sauté until browned and cooked through, about 5 minutes. Remove the pork from the skillet and set aside.
In the same skillet, add the remaining tablespoon of vegetable oil. Sauté the minced garlic for about 30 seconds, until fragrant.
Add the mixed vegetables to the skillet and stir-fry for about 2-3 minutes until they are heated through.
Push the vegetables to one side of the skillet and crack the eggs into the empty space. Scramble the eggs until fully cooked, then mix them with the vegetables.
Add the cooked rice to the skillet, breaking up any clumps. Stir well to combine everything.
Pour in the soy sauce and oyster sauce, along with sesame oil and black pepper. Stir-fry everything for about 3-4 minutes, ensuring the rice is evenly coated and heated through.
Finally, add the cooked pork and chopped green onions back to the skillet. Mix well for an additional 1-2 minutes until everything is heated through. Adjust salt if necessary.
Serve the Pork Fried Rice hot, garnished with additional green onions if desired.