Heat a large non-stick 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 hot skillet.
Sauté the chicken for 5-6 minutes until golden brown and cooked through, then remove it from the pan and set aside.
Add the remaining sesame oil to the pan along with the minced ginger and garlic, sautéing for 30 seconds until fragrant.
Stir in the chilled jasmine rice, frozen peas, and frozen carrots, pressing the rice down firmly to allow it to crisp for 2 minutes.
Push the rice and vegetable mixture to one side of the skillet and crack the egg into the open space.
Scramble the egg until fully set, then fold it into the rice mixture.
Return the cooked chicken to the pan, drizzle with tamari, and add the sliced green onions.
Toss everything together for one final minute to ensure the flavors are well combined and serve hot.