Peter Hoffman's Romesco Sauce

Here is my version of the classic Spanish sauce. Consider it a condiment to use in myriad ways starting with as the sauce to accompany grilled calçots (leeks), but you can also use it to top grilled meats, as a spread on toast to complement a hearty soup, or as a sauce for grilled or baked fish (use some stock or broth to loosening the romesco to creat…