This place is always on my to do list when in Vegas whether it's for lunch, snack or late night eats. Not quite a secret but it is pretty hidden with no signage. It's located on the 3rd floor in the Cosmopolitan Hotel. You'll see a very long hallway with pictures on the wall and if it's late, you will usually see a line out the door.
They sell pizza by the slice for about $5.00+ and also whole pies. They have more pizzas than what's on display so just order what you want and they can also throw some toppings on. But my fav is the white pizza. After you pick your pizza, you pay and then put your slice in the oven so it's hot and crispy when you get it.
If there's a line, I would wait, the pizza is worth it!!!