In a small bowl, whisk together the coconut aminos, rice vinegar, tomato paste, honey, grated fresh ginger, and minced garlic to create the sweet and sour sauce.
Cut the chicken breast into bite-sized pieces 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 sauté for 5-6 minutes until golden brown and cooked through, then remove the chicken and set aside.
In the same skillet, add the sliced bell peppers, snap peas, and pineapple chunks, cooking for 3-4 minutes until the vegetables are crisp-tender.
Return the chicken to the skillet and pour the prepared sauce over the mixture.
Toss everything together for 1-2 minutes until the sauce thickens and creates a glossy glaze over the chicken and vegetables.
While the stir-fry finishes, lightly sauté the cauliflower rice in a separate pan over medium heat for 5 minutes until tender.
Divide the cauliflower rice into bowls and top with the sweet and sour chicken stir-fry.