Divide the dough into four equal pieces. Roll out each piece to about twice the size of your ham slices. In the middle of the dough, place the ham, followed by the steak. Top with mushrooms, feta cheese, thin slices of cheddar cheese, and a few thin squares of cream cheese. Pull up the dough from the sides and fold it over the fillings to close, making a square packet. Place folded side down on a baking sheet which has been sprinkled with corn meal. Cover and let rise for about 20 minutes in a warm place.
Place in oven and lower temperature to 400 oF. Bake for about 10 to 15 minutes, or until the dough has browned and sounds hollow when tapped on the bottom.
Combine the topping ingredients and serve each maslenica hot, with a few spoonfuls of the topping spread on top. It's fairly decadent, but very satisfying on a cold winter day!