The emphasis of this thread appears to be on the pastry wrapping - fair enough - but I decided to try and get the flavour of the filling right, before I spend time on the pastry.
Over the past few weeks, I've made several different recipes for lamb samosa fillings, eating them with rice, as a main meal. The two best samosas I've ever had served up in a restaurant were (1) on the lawn of a 5 star hotel in North India, and (2) a BIR in Hertfordshire (their main course dishes were lacklustre). I can recall the delicious flavour of those samosas and that's what I seek to recreate at home. Plenty of BIRs serve samosas with a flavour I'd describe as 'quite good' and other BIRs serve up samosas which taste barely adequate. Curryhell's samosa filling recipe would come into the 'barely adequate' category for me. It appears to be based on a recipe from a Pat Chapman book, and I never rated his recipes. Or perhaps CH and PC took their recipes from another source. I know all this is so subjective but that's my take, for what it's worth.