Entered for safe-keeping, from Modernist Cuisine. I like how pressure cookers keep the flavor in, and wasn't completely satisfied with other P.C. recipe I found on the site. For a zestier sauce, try adding chili flakes, pureed anchovies or fresh basil. I like to toss in a parmesan cheese rind for flavor, then remove it after cooking. If you don't include the optional anchovies, this is vegetarian/vegan.