In a small bowl, whisk together the fresh orange juice, orange zest, coconut aminos, minced ginger, minced garlic, and arrowroot powder until the starch is fully dissolved.
Season the cubed chicken breast evenly with the sea salt and black pepper.
Heat the avocado oil in a large skillet over medium-high heat and sauté the chicken until golden brown and cooked through, about 6-8 minutes.
Remove the chicken from the skillet and set aside; add the broccoli florets and sliced bell peppers to the same pan with a splash of water, covering with a lid to steam for 3 minutes.
Return the chicken to the skillet and pour the orange glaze over the mixture, stirring constantly for 1-2 minutes until the sauce becomes thick and glossy.
In a separate non-stick skillet, lightly sauté the cauliflower rice with the toasted sesame oil for 4 minutes until tender and fragrant.
Divide the cauliflower rice into bowls and top with the orange chicken stir-fry, finishing each portion with a sprinkle of sesame seeds.