Preheat the oven to 350 degrees F. Place a piece of parchment onto a rimmed baking sheet.
In a large bowl, combine the ground beef, ground pork, egg, tomato sauce, onion, mustard, garlic, salt, pepper. Mix until well combined.
Use your hands to form the meat mixture into 1 3/4 inch round meatballs (they will shrink after baking).
Place the meatballs onto the prepared baking sheet. Place into the oven to bake for 25-30 minutes or until cooked through and no longer pink inside (160 degrees F internal temperature).
Meanwhile, make the sauce: Place the butter in a saucepan and heat until the butter sizzles and brown flecks appear, stirring constantly to keep the butter from burning. Reduce the heat to low. Whisk in the cream cheese, broth, and cheese. Use a stick blender to puree until smooth.
When the meatballs are done, remove them from the oven. Allow to cool for 30 minutes in the fridge, so the frosting doesn't melt when you place it onto the meatball cake pops.
Once the meatballs are cool, place a corn dog stick into the center of each meatball. Dip each meatball into the warm sauce for a thin layer over each meatball. Place the empty end of the stick into a small pumpkin.
Slice the prosciutto into 1/4 thin thin strips. They may break in spots, but that is ok. Use the pieces to wrap around the frosted meatballs while leaving an open strip of area for 2 eyeballs.
Place 2 peppercorns into the frosting in the open area.
Serve or if desired, reheat in a 350 degree F oven for 5 minutes or until heated through.