Romesco Sauce - (Salsa Romesco)

"This peppery sauce is used primarily with fish, but is good with vegetables and excellent for basting grilled lamb chops. Romesco is a specialty of the province of Tarragona, where contests are held in which over two dozen chefs may compete for the championship of Romesco making. The sauce can be made in an electric blender in less than 5 minutes and comes out very well, although chefs competing in the Romesco contest always use a mortar and pestle, which, they say, extract more oil from the nuts. Makes 1 to 1 1/2 cups"