I order lamb methi at my favourite restaurant in Glasgow which is Punjabi. Like most of their lamb dishes(not tikka), they resemble a spicy stew, with no overwhelming background taste (base / garlic/ginger etc) making each dish fairly unique in its own right. They use spinach also in theirs which I find has a similar flavour to methi. Not sure if its pureed / canned or fresh spinich, but the flavour is intense. Smoky/musty description is spot on...If anyone else has other recipies for methi i'd be interested!