Incidentally, if you are interested in trying the butter chicken once again, George, I strongly recommend not heating it in the oven for 25 minutes. I re-heat mine in a shallow wok, in an excess of garlic-infused and chilli-infused rapeseed oils, and to my mind the addition of these oils (in excess) is a significant factor in the excellence of the dish, as is the addition of kala namak. I estimate that the dish needs heating for no more than eight minutes, and probably less — however long it takes to cook a frozen paratha from scratch.
P.S. Managed to acquire 2 x butter chicken and 1 x beef Madras in the Bodmin branch today. I won't make any further report on the butter chicken, since I now know that I like it, but will report on the beef Madras once I have tried it.
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** Phil.