Heat a large skillet or wok over medium-high heat and add half of the toasted sesame oil.
Season the diced chicken breast with sea salt and black pepper, then add it to the skillet.
Cook the chicken for 5-6 minutes until golden brown and cooked through, then remove from the pan and set aside.
Add the remaining sesame oil to the skillet along with the diced carrots and frozen peas, sautéing for 3 minutes until the carrots are tender-crisp.
Stir in the minced garlic and grated fresh ginger, cooking for 30 seconds until the mixture becomes fragrant.
Push the vegetables to the outer edges of the skillet and pour the whisked egg into the center.
Gently scramble the egg until it is just set, then break it into small pieces with your spatula.
Add the chilled jasmine rice and the cooked chicken back into the skillet.
Pour the tamari over the rice and toss all ingredients together over high heat for 2-3 minutes until the rice is heated through and slightly crispy.
Garnish with sliced green onions and serve immediately.