Season the diced chicken breast with sea salt and black pepper.
Heat the toasted sesame oil in a large non-stick skillet or wok over medium-high heat.
Add the chicken to the skillet and cook until golden brown and cooked through, approximately 5 minutes, then remove and set aside.
In the same skillet, add the diced carrots and frozen peas, sautéing for 3 minutes until they begin to soften.
Stir in the minced garlic and grated fresh ginger, cooking for 30 seconds until the mixture becomes fragrant.
Push the vegetables to one side of the pan and crack the egg into the empty space, scrambling it until fully set.
Add the chilled cooked jasmine rice and the prepared chicken back into the skillet, breaking up any rice clumps with a spatula.
Drizzle the tamari over the rice mixture and stir-fry for 2-3 minutes until the rice is heated through and develops a slightly crispy texture.
Garnish the dish with sliced green onions and serve immediately while hot.