Super-Simple Tomato and Nigella Soup

Soup isn’t part of the Indian culinary language but there is something so wholesome about it, and because it is not something I learned at my mother’s knee, I always feel so clever when I make it from scratch. I know that the ease and nursery appeal of canned, ready-made tomato soup is hard to beat, but this is sublime and can be made for a fraction of the cost, plus it’s completely free from any preservatives or any of those hidden ingredients that didn’t come from your own heart. I add bu