Preheat oven to 350F degrees. Spray 10 muffin cups with non stick cooking spray.
Open the french bread roll and place on wooden cutting board. With a sharp knife, cut the dough vertically into 10 equal rolls, about 1 inch thick.
Take the first slice of dough and press with hands to flatten it into 3inch flat rounds. Repeat for each slice of dough.
Place each flat round into greased muffin tin cup. Press them into the sides. Set aside.
In a skillet, heat oil over medium heat. Place the washed spinach, cook and stir until wilted, about 3 minutes.
Add garlic, cook for another minute or so. Turn the heat off.
In a medium bowl, combine Parmesan and Mozzarella cheese, Cream cheese, garlic salt, salt, pepper. Add cooked spinach and mix until combined.
Spoon the mixture evenly into the bread bowls. Sprinkle shredded mozzarella cheese over each bowl.
Bake for 15 - 17 minutes or until the bread starts getting brown on the edges. Let cool for 5 minutes or so before serving.