Extremely tender beef at hospital My dad was recently in the hospital for intestinal surgery.  While he was recovering they served him some beef that he was very surprised to find incredibly tender.  He let me have a bite.  It was so tender you hardly needed to chew at all. 

It was served as some kind of boneless fillet with a dark brown gravy on top.

I've cooked a lot of beef, but never was it this soft.

Can anyone help me find this recipe or teach me a technique with the same effect?
One possibility is that the meat was cooked in a crock pot. This would make sense on a few levels. 

First, since it is a hospital and presumably they have a large amount of people to feed, cooking multiple steaks in a large crock pot at once would save time and still produce quality food.

Second, cooking the meat slowly in a crock pot (or in liquid) over the period of 10 hours will produce incredibly tender meat, especially if the steak was already of good quality to begin with. Similar process is used to produce various roasts and also pulled pork, for example, which will literally fall off the bone once done cooking.