Pat the chicken breast dry with paper towels and cut into 1-inch cubes.
In a medium bowl, toss the chicken with arrowroot powder, sea salt, and black pepper until evenly coated.
Heat olive oil in a large skillet over medium-high heat until shimmering.
Add the chicken to the skillet in a single layer and cook for 3-4 minutes per side until golden brown and crispy.
Remove the chicken from the pan and set aside on a plate.
In the same skillet, add the sliced bell peppers and sauté for 3 minutes until slightly softened but still crisp.
Stir in the minced garlic, ginger, and pineapple chunks, cooking for another 1 minute until fragrant.
Whisk together coconut aminos, rice vinegar, and honey in a small bowl, then pour the mixture into the skillet.
Return the crispy chicken to the pan and toss everything together for 1-2 minutes until the sauce thickens and coats the ingredients.
Serve immediately while the chicken is hot and the sauce is glossy.