The steak and corn can be grilled up to a day ahead and stored in the refrigerator, in separate containers; serve them cold or at room temperature. The chimichurri can also be made up to a day ahead; store it in the refrigerator, in a jar with a thin layer of olive oil on top. Shake to combine before serving, at room temperature.
When buying corn, look for ears with bright green, snugly fitting husks and golden brown silk; the kernels should reach the ear's tip in tightly spaced rows and should appear plump and milky. Also try: Mexican Corn.
The base for this soup, corn stock, can be frozen and used in all kinds of vegetable soups. It is also a good poaching stock for fish. You can play around with different flavors: Add savory vegetables such as celery and onions, and herbs such as parsley and cilantro. Recipe copyright 2012 by Eugenia Bone.