Preheat oven to 425F. Lightly spray a 9×13” metal pan and then line with parchment (leaving a 1” overhang). Spray the parchment paper and set the pan aside.
Pinch off a 2×2” round piece of dough and flatten on a lightly floured board to a 4” round circle. Take a cube of cheese and wrap an ounce of ham around it followed by an ounce of turkey. Place in the center of the dough and gently pull up the edges to form a purse. Gently pinch the ends together and tuck into itself until tightly sealed. Place seam side down in the pan. Repeat until all the dough is used up – you’ll place the dough balls side by side. It’s okay that they touch barely but don’t overcrowd as they will expand.
In a bowl mix together the mustard and melted butter. Using a pastry brush, brush the tops with the mustard mixture. Sprinkle with parsley. Bake for 20 minutes or until the tops golden brown. Remove from the oven and evenly divide the shredded Parmesan cheese on top. Bake for an additional 1-2 minutes or until the cheese is melted.