This corn soup is simple, full of corn flavor, and delicious whether you decide to eat it hot or cold (although since the height of corn season is the height of summer, you might choose to serve it chilled more often than not). By grating the corn off the cob, you avoid having to strain this corn-centric soup to remove excess husky or fibrous kernels. The bit of onion adds sweetness; the potato adds body. Serve this soup hot or, better yet, chilled. If you're feeling fancy, garnish with minced roasted chile, chopped cilantro, or diced avocado or tomato.