In a large clear glass serving bowl, layer the romaine lettuce, chicken, Monterey Jack cheese, black beans, mango, tomatoes, cheddar cheese, and green onions in the order listed.
In a small bowl, whisk together the piña colada yogurt, lime juice, and Caribbean jerk seasoning until smooth.
Pour the dressing evenly over the layered salad.
Sprinkle the chopped cashews over the top.
Serve immediately or refrigerate until ready to serve.