Sprinkle 1 to 2 pinches of jerk dry rub over each chicken tenderloin, rub or massage right in
Turn chicken over and repeat
Cover and set in fridge for 20 minutes to 8 hours
Preheat oven to 375 degrees
Spray with oil or line a cookie sheet with parchment paper, set a cooling rack on the cookie sheet
Lay each chicken tenderloin on the cooling rack
Roast for 10 minutes, turn the chicken tenderloin over and roast for another 10 minutes or until internal temperature is 165 degrees
Turn oven broiler on and broil for 2 to 3 minutes just to add a bit of color to the chicken
Top each chicken tenderloin with 2 to 3 spinach leaves (enough to cover)
Top with a mozzarella cheese slice
Broil for 2 to 5 minutes, just to start the cheese melting and browning
Remove from oven and serve warm