In a small bowl, whisk together the peanut butter, honey, soy sauce, lime juice and cayenne until smooth. It's okay to add a little bit of water to thin it out, if needed.
SALAD
Season the chicken breasts with the salt and pepper. In a 12 inch nonstick skillet, heat the oil over medium high heat. Add the chicken and cook until golden brown and cooked through, about 8 minutes per side. Transfer to a plate and let cool before slicing into thin strips.
In a large bowl, toss the romaine, cabbage, carrots and scallions. Add the sliced chicken, drizzle the dressing over the top, and toss gently to coat. If the dressing is too thick, it's okay to thin it out with a little bit of water... or you can heat it in the microwave to serve as a hot dressing.
To serve, divide the salad among 4 plates or bowls, sprinkle with the chopped peanuts, and garnish with lime quarters.
Notes
If you are preparing this recipe as GLUTEN-FREE, just be sure to use brands of peanut butter and soy sauce that are known to be GF.