Pat the chicken breast dry with a paper towel and dice into small, even bite-sized pieces.
Season the chicken pieces uniformly with sea salt and black pepper.
Heat the extra virgin olive oil in a large skillet or wok over medium-high heat until shimmering.
Add the chicken to the pan in a single layer and cook undisturbed for 3 minutes to develop a golden, crispy crust.
Flip the chicken and cook for another 2 minutes until fully opaque and cooked through, then remove from the pan and set aside.
In the same pan, add the toasted sesame oil, minced garlic, and grated ginger, sautéing for 30 seconds until aromatic.
Add the frozen peas and carrots to the skillet, stirring frequently for 2 minutes until they are tender and bright.
Incorporate the cooked brown rice and tamari, pressing the rice into the bottom of the pan for 2 minutes to allow it to crisp slightly.
Return the cooked chicken to the pan, tossing all ingredients together until well combined and heated through.
Garnish the dish with thinly sliced green onions and toasted sesame seeds before serving hot.