spiced onions

Nigella Lawson’s fish finger bhorta is soft-cooked onions with garlic, ginger and chilli, spiked with mustard, then crisp fish fingers mashed in with spinach, coriander and lime, topped with pink-pickled onions. It’s a comfort-food supper for 2, from her book Cook, Eat, Repeat. She’s the first to admit she never expected to put a fish …