Whisk the fresh orange juice, orange zest, tamari, honey, grated ginger, minced garlic, and arrowroot powder in a small bowl until the glaze is smooth.
Season the diced chicken breast evenly with 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 until golden brown and cooked through, approximately 5 to 7 minutes.
Remove the chicken from the pan and set aside, then add the sliced bell peppers and snap peas to the same skillet.
Sauté the vegetables for 3 minutes until they are crisp-tender and bright in color.
Pour the orange glaze into the skillet with the vegetables and simmer for 1 minute until the sauce thickens into a sticky coating.
Return the cooked chicken to the pan and toss everything together to ensure every piece is well-coated in the glaze.
In a separate pan, lightly steam the cauliflower rice until tender, then serve the orange chicken over the rice and garnish with sliced green onions.