Dice the chicken breast into bite-sized pieces and toss in a small bowl with arrowroot powder, sea salt, and black pepper until evenly coated.
In a small glass jar, whisk together the orange juice, orange zest, tamari, honey, minced ginger, and minced garlic to create the glaze.
Heat one teaspoon of avocado oil in a large skillet or wok over medium-high heat. Add the chicken and cook until golden brown and cooked through, about 5-6 minutes. Remove chicken from the pan and set aside.
Add the remaining teaspoon of oil to the same pan. Stir-fry the broccoli, bell pepper, and sugar snap peas for 3-4 minutes until they are bright and crisp-tender.
Return the chicken to the pan and pour the orange glaze over the mixture. Toss constantly for 1 minute until the sauce thickens and coats everything beautifully.
Steam the cauliflower rice in a separate pan or microwave until tender, then serve the orange chicken and vegetables immediately over the hot cauliflower rice.