Preheat oven to 350°F. Thaw frozen spinach and drain in a sieve, pressing to extract excess water. Place spinach in a bowl and set aside.
Sliced the top off the loaf of bread horizontally and scoop out the interior bread leaving a crust container.
In a mixing bowl add the cream cheese, mayonnaise, sour cream, onion soup mix package and black pepper. Mix to blend and add 1 cup pepper jack and the feta cheese and mix. Next add the spinach and Summer Sausage. Stir to combine.
Divide the filling between loaves of bread and top with remaining 1 cup mozzarella cheese. Bake for 20-24 minutes until top is golden and bubbling. Allow to cool slightly before slicing top with Cloverdale Bacon. Enjoy!