In a small bowl, whisk together the fresh orange juice, coconut aminos, grated ginger, minced garlic, and arrowroot powder until the mixture is smooth and combined.
Season the diced chicken breast evenly with the 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 skillet and cook for 5-6 minutes, stirring occasionally, until the pieces are golden brown and cooked through.
Add the broccoli florets, sliced red bell pepper, and sugar snap peas to the skillet, stir-frying for 3-4 minutes until the vegetables are tender-crisp and vibrant.
Pour the orange sauce mixture over the chicken and vegetables, tossing constantly for 1-2 minutes until the glaze thickens and coats the ingredients thoroughly.
Remove from heat and stir in the toasted sesame oil for a nutty finish.
Steam the cauliflower rice in a separate pan or microwave until tender, then serve the orange chicken and vegetables immediately over the rice.