Bengali Egg Curry

When I visit relatives in Kolkata I’m often woken up by the egg and milk seller as he pushes his cart along the street outside. I rather like the way he calls up ‘dim’ (meaning egg) in a long harmonious “diiiiiimmmmm” sound followed by ‘dut’ (meaning milk), again a rather elongated “duuuuuuuuuut”. I became a huge fan of egg curry the first time I ate it and have cooked it regularly ever since. Typically, Bengalis would cook this dish with mustard oil, but if you find it hard to source, then