This unusual, subtly sweet and spicy carrot tagine is made wonderfully rich and tangy with the last-minute addition of yoghurt. Serve it with plain buttered couscous, Wedding Couscous or Mixed Spring Greens with Golden Raisins & Couscous. It is also delicious with Long-grain Rice with Lemon & Toasted Almonds. (Recipes for these serving suggestions can all be found in the New Feast cookbook.)