In a small bowl, whisk together the coconut aminos, apple cider vinegar, raw honey, and arrowroot powder to create the stir-fry sauce.
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 pan and sear until golden brown and fully cooked, then remove the chicken and set it aside on a plate.
In the same skillet, add the minced garlic and grated ginger, sautéing for 30 seconds until fragrant.
Add the red and green bell peppers along with the broccoli florets, stir-frying for 3-4 minutes until they are tender-crisp.
Stir in the pineapple chunks and return the cooked chicken to the skillet.
Pour the prepared sauce over the chicken and vegetables, tossing constantly for 1-2 minutes until the glaze thickens and coats everything.
In a separate pan, lightly steam or sauté the cauliflower rice until warm and fluffy.
Serve the sweet and sour chicken immediately over the cauliflower rice.