Slice the chicken breast into 1-inch bite-sized cubes and season evenly with sea salt and black pepper.
In a small bowl, whisk together the orange juice, orange zest, coconut aminos, honey, arrowroot powder, minced ginger, and minced garlic until the starch is fully dissolved.
Place the broccoli florets in a steamer basket over boiling water and steam for 4-5 minutes until they reach a vibrant green, crisp-tender texture.
Heat the avocado oil in a large skillet over medium-high heat. Add the chicken cubes in a single layer and sear until golden brown and cooked through, about 6-8 minutes.
Pour the orange sauce mixture into the skillet with the chicken. Stir constantly for 1-2 minutes as the sauce bubbles and thickens into a glossy, sticky glaze that coats the chicken.
In a separate pan or the microwave, lightly steam the cauliflower rice until tender.
Plate the cauliflower rice, top with the glazed orange chicken, and serve the steamed broccoli on the side.