Begin by preparing your ingredients: chop green onions, mince garlic, and ensure your rice is cooked and chilled if you are using leftover rice.
Heat the vegetable oil in a large skillet or wok over medium-high heat.
Once the oil is hot, add the beaten eggs and scramble until fully cooked. Remove the eggs from the skillet and set aside.
In the same skillet, add more oil if necessary and sauté the minced garlic until fragrant, about 30 seconds.
Add the diced chicken (or tofu) and cook for about 2-3 minutes until heated through.
Stir in the frozen peas and carrots mix and cook for another 2-3 minutes until the vegetables are warmed.
Add the cooked rice, soy sauce, and sesame oil (if using) to the skillet. Stir well to combine all the ingredients and evenly distribute the sauce.
Fold in the scrambled eggs and chopped green onions. Taste and adjust seasoning with salt and pepper if required.
Continue to stir-fry for another 2-3 minutes, ensuring everything is heated thoroughly and well combined.
Remove from heat and serve hot.