Absolutely!  Cooking is really the art of creating flavors that YOU love, so if you love things cheesy then throw on some extra cheese.  If you think everything is better with capers, then put some of those in.  If you are obsessed with spinach, or garlic or artichokes then you can double it!  This recipe is really forgiving as far as you being able to add, subtract, modify and adapt it, so don't be afraid to put your own spin on this Tuscan Garlic Chicken.