As we were eating, Mr Minx remarked that he would have liked to know about doing something like this in his bachelor days, but back then, a "taco" to him involved one of those nasty u-shaped hard-shell things that come in a yellow box, filled with ground beef mixed with ultra-salty packaged seasoning. He knew of flour tortillas, of course, but never thought to use them at home for anything. They seemed to be the jurisdiction of restaurants specializing in fajitas and burritos. Now we eat flour tortillas all the time - usually filled with whatever might be hanging around in the fridge.
Long have I toyed with the idea of writing a cookbook on using leftovers creatively. There's no need to eat three-day-old pork tenderloin with the same sauce and sides it was served with originally! Use it in pasta sauce, or on pizza, or...in tacos.
Would anyone be interested in my book, should I ever write it?