Chick Pea and Mushroom Curry

Serves 4 2 tsp olive oil 250g/8oz button mushrooms, quartered 1 small onion, chopped 2 cloves garlic, chopped 1 small piece fresh root ginger, peeled and chopped 425g/14oz tinned chick peas, drained 400g/13oz tinned tomatoes 1 tsp ground coriander 40g/1 ½ oz. cashew...