Preheat a large deep skillet to medium high. Add the coconut oil and once melted, add the red bell pepper. Saute for 2-3 minutes to soften. Then scoop out the bell pepper.
Sprinkle the arrowroot powder and salt over the cut chicken pieces and toss to coat. Add the chicken to the skillet. Stir and saute for 5-8 minutes until the chicken is mostly cooked through and seared on the outside.
Meanwhile, whisk all the ingredients for the sauce in a small bowl. Once the chicken is mostly cooked, add the sauce to the skillet and stir. Add the red bell peppers and cashews to the skillet. Once the sauce starts to simmer, lower the heat to medium-low, and simmer another 3-5 minutes to thicken.
If the sauce tightens up too much, add a little water to loosen it. Turn the heat off and add the chopped scallions. Serve warm with Roasted Cauliflower Rice.