Dice the chicken breast into small, uniform bite-sized pieces and season with sea salt and black pepper.
Heat the avocado oil in a large skillet or wok over medium-high heat until shimmering.
Add the chicken to the pan and sear for 5-6 minutes until golden brown and cooked through, then remove the chicken and set it aside.
In the same pan, add the diced onions and carrots, sautéing for 3-4 minutes until the carrots begin to soften.
Stir in the minced garlic, grated ginger, and frozen peas, cooking for 1 minute until highly fragrant.
Push the vegetables to the outer edges of the pan and crack the egg into the center, scrambling it until just set.
Add the chilled jasmine rice and the cooked chicken back into the pan, using a spatula to break up any rice clumps.
Pour the tamari and toasted sesame oil over the mixture, tossing everything together for 2-3 minutes until the rice is heated through and slightly crispy.
Remove from heat, garnish with sliced green onions, and serve immediately.