That looks a nice curry, Goncalo, but for me at least (an "old-school" curry man), the dish is far too wet to be a bhuna as I know the dish. The bhunas that I used to eat and love were dry(ish) dishes, no wetter than a good mushroom bhaji, and were certainly not swimming in sauce as yours is. The colour looks right, though, so I would be interested to see a future version in which you used no more than (say 15% of the sauce that you used to make this one, and in which you focussed on cooking the dish in oil and the meat's own juices rather than in a base.
** Phil.