When my father-in-law travels to Iran, we are the beneficiaries. He often brings us large bags of pistacios and tiny sacks of saffron (and if my husband is lucky, a box of gaz – Persian nougat with pistacios). Over the years, I’ve grown to love the flavor of saffon. Too much and it’s almost metallic, too little and you’ll miss the essence of it. But saffron adds such earthy-sweet, delicious flavor to dishes that I knew from this start that Saffron-Spiced Tongue would be great. …