Located in Cosmo Place, between Southampton Row and Queen Square in Bloomsbury, the Cosmoba restaurant has been run by the same family for several decades. It serves a varied clientele of locals, tourists from the nearby hotels, visitors to the nearby British Museum, and academics from the University of London.
It is not the sort of place where you photograph the food, so you will have to take my word for it that the menu changes quite often, and it is usually a good idea to go for one of the specials. Otherwise, I can recommend one of their staples: the rigatoni with aubergine, tomato and ricotta.
Should you not be around Bloomsbury, a diverting half-hour can be spent reading the witty responses by Umberto, the owner, to the few complaints they get on TripAdvisor.