Preheat oven to 375 F. Line a baking sheet with unbleached parchment paper.

In a glass bowl, add the mozzarella cheese and cream cheese. Microwave in 30 second bursts to melt.

In a a medium mixing bowl, add the Miracle Mix, egg, vinegar and sour cream. Whisk to combine.

Add the melted cheese mixture and stir, then knead with your hands to form a soft dough.

Divide dough into 6 equal pieces and roll into a ball. Place on prepared baking sheet.  

Mix egg yolk with 1 tsp. water and brush the rolls. Top with sesame seeds.

Transfer to the oven and bake 20-22 minutes until golden.

Let cool on a wire rack.