It's not a topping. In this reader's version, potato slices form the "crust" of potato pizza.
Our family enjoys potato pizza, a healthy snack that’s fun to make. First, slice a large potato lengthwise into slices about one-third-inch thick. Boil the slices until they are just fork-soft. Drain and place the slices on a cookie sheet.
Spoon on pizza sauce, then add shredded cheese and any meat or veggie toppings you like. Bake at 350 degrees Fahrenheit until the cheese starts to bubble. Enjoy!