This comes from an astonishingly talented chef, Pablo Jacinto, who is from the Oaxaca region of Mexico. He calls this MOLE DE LA SUEGRA , Mother-In-Law's Mole. The recipe is in two parts, but you could easily separate them. They are fabulous as regular tostadas, or miniature ones for appetizers, tostaditas. They can be made ahead, and assembled just before guests arrive. To get the deep and complex flavour, there are no shortcuts. You can, however, get good results starting with a supermarket roasted chicken, since most of the good flavour is in the sauce. Apparently you can make it with leftover dark meat turkey too, but I haven't done that.