Heat vegetable oil in a large wok or skillet over medium-high heat. Add beaten eggs and scramble until just cooked. Remove and set aside.
In the same pan, add garlic and cook for 30 seconds until fragrant.
Add chilled rice, breaking up any clumps with a spatula. Stir-fry for 3-4 minutes until rice is heated through and starting to get slightly crispy.
Add diced chicken, peas and carrots, and ground ginger. Stir-fry for 2-3 minutes until vegetables are heated through.
Return scrambled eggs to the pan, breaking them into smaller pieces. Add soy sauce and sesame oil, tossing everything together.
Stir in green onions and cook for 1 more minute. Season with salt and pepper to taste.
Serve immediately while hot, garnished with extra green onions if desired.