Pat the chicken breast dry and dice into bite-sized pieces, then season with sea salt and black pepper.
Heat avocado oil in a large skillet or wok over medium-high heat until shimmering.
Add chicken to the pan and sear until golden brown and cooked through, about 5-6 minutes.
Remove chicken from the pan and add the broccoli and shredded carrots, sautéing until tender-crisp.
Stir in the minced garlic and grated ginger, cooking for 1 minute until fragrant.
Add the cooked brown rice, sesame oil, and coconut aminos to the skillet, tossing everything together.
Return the chicken to the pan and stir-fry for 2 minutes until the rice develops a slight crisp.
Garnish with sliced green onions and sesame seeds before serving.