Pepperoni may be America’s most popular topping, mushroom may be the one addition where meat-lovers and vegetarians can find common ground, and sausage is the only other meat that can overtake our bacon obsession, but if you believe one study, when we order in, 37 percent of us order our pizza naked. Just cheese, sauce, and bread. Does that make us boring, indicate lack of imagination, or mean we can’t agree on anything? All of the above? Or maybe we’re purists? Whatever you believe, the plain cheese pie is the baseline by which all pizzerias can be judged. If you don’t do this right, you don’t deserve to top your pies. And because a list of the best cheese pizzas in America may be the purest list of the best pizzas in America, we’ve rounded them up in honor of National Cheese Pizza Day (September 5).