Lamb neck makes a lovely Irish Stew.
I usually cook up all the scrag pieces when I am cooking the leg Hally. They I let DH just sit and pull bits off it for a snack or do it myself and make a 'free' shepherds pie or something with it. There is plenty of meat in there amongst the fat and if you don't mind spending some time getting it out and getting messy, it is worth the effort.
Waste not, want not aye Kathryn I have often though, whilst doing these messy jobs, who else would be bothered doing this - now I know the answer to that, you