As versatile as pesto, romesco sauce hails from Catalonia, Spain. It makes an exquisite accompaniment to a seafood stew or grilled fish or vegetables.
Make Ahead Tip: Cover and refrigerate for up to 2 days.
Note: The New Mexican chile is a long green variety that turns red in the fall. It used to be known as the Anaheim, but it has been renamed because few chiles are grown near the city of Anaheim these days. Dried New Mexico chiles are sweet with a hint of spiciness. They can be found in the specialty-produce section of the supermarket, in gourmet-food markets or online at melissas.com.
Tip: To toast chopped nuts: Place in a small dry skillet and cook over medium-low heat, stirring constantly, until fragrant and lightly browned, 2 to 4 minutes