An easy, good-for-you soup that will warm you up on a cold day. Carrot and coriander soup freezes well, so put portions in the freezer and you'll always have something healthy, filling and convenient available for lunch.
1 tbsp vegetable oil
1 onion, sliced
450g/1lb carrots, peeled and sliced
1 tsp ground coriander
1.2 litres/2 pints vegetable stock
large bunch fresh coriander, roughly chopped
salt and freshly ground black pepper
