Defrost the spinach on the counter and hour before preparing. Then add the spinach into a clean kitchen towel and squeeze all of the liquid out of the spinach.
Place the contents of the artichokes in a colander and use your hands to squeeze the artichokes so all of the liquid drains. This will chop up the artichokes too.
In a mixing bowl add the drained spinach, artichokes, cream cheese, mayonnaise, 5 oz. of shredded mozzarella, minced dried onions, Pecorino Romano cheese, chopped fresh garlic, and all of the seasoning. Mix! Mix!
Top with the extra 2 oz. of shredded mozzarella cheese and cracked black pepper.
Spray an 8x8 baking dish and add the dip.
Bake in a preheated oven at 350 degrees F. for 30 minutes.
Broil for about 1 minute or so until it browns.
Enjoy the best dip ever! Make it!