I was wary of my sister's cooking, which invariably consisted of a tubular pasta and economy cheese, charred black on the surface, with either tinned tuna or lardy mince lurking beneath the molten crust ... So that evening, in a tiny flat in Tooting, I was pushed into the tiny kitchen where sixteen people sat crammed around a tiny trestle table designed for pasting wallpaper, one of my sister's notorious pasta bakes smouldering in its centre like a meteorite, smelling of toasted cat food.