Heat the vegetable oil in a large skillet or wok over medium-high heat.
Add the diced chicken breast to the skillet and stir-fry it for about 5-7 minutes until fully cooked and golden. Remove it from the skillet and set aside.
In the same skillet, add the minced garlic and diced onion. Sauté for about 2 minutes until the onions become translucent.
Add the diced red bell pepper and julienned carrot to the skillet, and cook for another 3-4 minutes until they soften.
Push the veggies to one side of the skillet and add the cooked rice to the empty side. Use a spatula to break up any clumps and integrate the rice with the vegetables.
Pour the soy sauce, oyster sauce, sesame oil, and cracked black pepper over the rice and mix well to combine all the flavors.
Add the cooked chicken back into the skillet, followed by the sliced green onions and Thai basil leaves. Stir-fry everything together for an additional 2 minutes until the basil wilts and all ingredients are well coated.
Taste the fried rice and adjust seasoning if necessary.
Notes
Serve garnished with additional Thai basil leaves and lime wedges.