In a small bowl, whisk together the honey, tamari, rice vinegar, minced garlic, grated ginger, and red pepper flakes to create the sweet chili sauce.
Dice the chicken breast into small, bite-sized pieces and season with sea salt and black pepper.
Heat the avocado oil in a large skillet over medium-high heat until shimmering.
Add the chicken to the skillet and cook for 5-6 minutes, stirring occasionally, until golden brown and fully cooked through.
Add the diced red bell pepper, shredded carrots, and diced water chestnuts to the pan, sautéing for an additional 2-3 minutes until the vegetables are slightly softened but still crisp.
Pour the prepared sweet chili sauce over the chicken and vegetable mixture.
Toss everything together for 1-2 minutes until the sauce reduces and forms a thick, sticky glaze that coats the chicken.
Remove the skillet from the heat and stir in the sliced green onions.
Carefully spoon the warm chicken mixture into the centers of the butter lettuce leaves.
Garnish each wrap with chopped cashews and sesame seeds for added texture and serve immediately.