I couldn’t find beef strip steak, so I used sirloin tips. This was probably my mistake, because other than that I followed the recipe exactly and my steak was very tough. Definitely stick with the beef strip. That being said, I still didn’t find the sauce very flavorful. Again, could have been my choice of meat, but I felt it lacked something (likely beef fat). I’d try it again using beef strip and hope for the best.