I just use diced casserole steak, chuck it in the slow cooker,no need to brown it, put in beef stock and leave to cook all day. Then take the meat out, put in pie dish, make a gravy with some granuals, put it in the pie dish, leave to cool for half an hour, roll out some shop bought puff pastry and put on the dish, in oven till golden and risen. i have a mixture of good and fussy eaters and everyone eats this. Oh and in the west of Scotland we put sausages with the steak, makes it go further, though for some reason the east coast don't do that or at least not where I now live.
Enjoy.