In a small bowl, whisk together the honey, tomato paste, rice vinegar, coconut aminos, grated fresh ginger, and minced garlic to create the sweet and sour sauce base.
Cut the chicken breast into 1-inch bite-sized cubes and season evenly with sea salt and black pepper.
Heat the avocado oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and sear until golden brown and cooked through, approximately 5 to 6 minutes, then remove the chicken from the pan and set aside.
In the same skillet, add the diced red and green bell peppers along with the red onion, sautéing for 3 to 4 minutes until the vegetables are crisp-tender.
Stir in the fresh pineapple chunks and the prepared sauce, allowing the mixture to simmer for 2 minutes until the sauce thickens and becomes glossy.
Return the cooked chicken to the skillet, tossing thoroughly to coat every piece in the glaze.
In a separate pan, lightly sauté the cauliflower rice for 3 minutes until tender, then serve the sweet and sour chicken immediately over the cauliflower rice.