I don't have any left over gravy as I made an onion gravy to put the sliced beef in after letting it rest (I always put roast meat in gravy before serving to make it as moist as possible) so the gravy has already had meat in it and I wouldn't feel safe reheating it (meal is going to be eaten by 18 m/o DD and my 5 month pg self).
Can I mince the beef in my Bamix? I don't have an actual mincer so thought sticking chunks of it through the the grater attachment might surfice??
i made shepherds pie recently and whizzed up chunks of cold lamb in moulinex food processer. Then made Hugh FW's recipe, including the old gravy which was fab. Personally I would put your gravy into the pie...but each to their own.