Pat the chicken breast dry and season thoroughly with sea salt, black pepper, garlic powder, and ginger powder.
Heat the toasted sesame oil in a large skillet or wok over medium-high heat until shimmering.
Add the seasoned chicken to the pan and sauté until golden brown and cooked through, approximately 5 to 6 minutes, then remove from the pan and set aside.
In the same pan, add the diced carrots and sauté for 2 minutes until they begin to soften.
Stir in the frozen peas and the white parts of the sliced green onions, cooking for another minute.
Push the vegetables to the outer edges of the pan and crack the egg into the center, scrambling it quickly until just set.
Add the chilled cooked jasmine rice and the cooked chicken back into the pan, drizzling the tamari over the top.
Toss all ingredients together over high heat for 2 to 3 minutes until the rice is heated through and slightly crispy.
Garnish with the green tops of the sliced onions and serve immediately.