Make the sauce. Combine the coconut aminos, rice vinegar, sesame oil, honey, red pepper flakes, and a pinch of pepper in a small bowl or jar. Adjust according to taste. Set aside.
Sauté onions and garlic. Heat a large skillet or wok over medium-low heat, add oil, and let it get hot. Add onions, salt, and pepper, and sauté for 2-3 minutes, stirring occasionally, until softened and slightly browned. Then add garlic and ginger and saute for 1-2 minutes until fragrant.
Brown meat and saute veggies. Add chicken to the pan, break it up with the back of a spoon, and saute for 2-3 minutes, continuing to break it up as it cooks. Next, add carrots, bell peppers, salt, and pepper, mix to combine, and saute for 2-3 minutes until chicken is browned and veggies are softened.
Bring it all together. Add your sauce and stir well to combine and let warm through, about 1-2 minutes. Make sure to mix well to ensure the sauce is fully incorporated into the chicken mixture. Turn off the heat and stir in sliced green onions and peanuts.
Enjoy! Serve chicken filling in lettuce cups with sliced cucumber, cilantro, more green onions, and sesame seeds.