Preheat the oven to 425°F and line a baking sheet with parchment paper.
Divide the pizza dough into four equal pieces. Roll each piece into an oval shape about ¼ inch thick, then trim the sides to form a simple ghost outline with a rounded top and pointed bottom.
Place the ghost shapes on the prepared baking sheet. Spread about 2 tablespoons of tomato sauce over each ghost, leaving a small border around the edges.
Sprinkle ½ cup of shredded mozzarella cheese evenly over the sauce on each ghost.
Slice each black olive in half and place two halves near the top of each ghost to form eyes.
Bake for 12 to 15 minutes until the crust is golden and the cheese is fully melted and bubbly.