It looks like pizza, smells like pizza, it even tastes a little like pizza, but it's not pizza. At least, not inasmuch as pizza is defined by its bread-based crust. The slice you are looking at shares much in common with pizza. It's got gooey melted cheese. It's got a robust tomato sauce that balances zestiness and sweetness with just the right bit of zip. It's got a crisp underbelly and a soft, moist, tender interior. It just happens to be made with noodles instead of dough.
'pizza recipe' on Serious Eats
Clam pizza is the kind of pizza that you need to start eating immediately after it's cut into slices, before the copious clam juices have a chance to render the crust completely soggy (though some degree of sogginess is inevitable—a feature for some, even). Even so, roasting a clam in the open heat of an oven is not the ideal way to do it, even if its been freshly shucked. Want to know the secret to the absolute tenderest, most flavorful clams and juiciest clam pizza around? Place the whole, unshucked clams on that pie before baking. It may look strange at first, and it will definitely look strange when it comes out of the oven, but the clams will be insanely tender and you won't lose a single drop of those precious juices.