Corn Stock for Gnudi with with Roasted-Corn Sauce

Melt butter in a stockpot over medium-high heat. Add corncobs, celery, carrot, onion, jalapeno, garlic, peppercorns, and herbs, and cook, stirring often, for 10 minutes. Add water, and bring to a boil. Reduce heat, and simmer 45 minutes.

Pour through a fine sieve, pressing on solids to extract as much liquid as possible. Discard solids. Stock can be refrigerated in an airtight container for up to 3 days or frozen for up to 1 month.