Leftover chargrilled steak is my go-to ingredient, too. Ground beef slow cooked with all the spices, then a good rare steak diced up and added at the last minute.
Not going to mention any of the other things I put in, lest the purists have a myocardial infarction.
Yeah, better keep those non-kosher ingredients out of the discussion. I may already have triggered heart issues with my list.