Spicy root & lentil casserole - Good Food Middle East

Ingredients

• 2 tbsp sunflower or vegetable oil
• 1 onion, chopped
• 2 garlic cloves, crushed
• 700g potatoes, peeled and cut into chunks
• 4 carrots, thickly sliced
• 2 parsnips, thickly sliced
• 2 tbsp curry paste or powder
• 1 litre/1¾ pints vegetable stock
• 100g red lentils
• a small bunch of fresh coriander, roughly chopped
• low-fat yogurt and naan bread, to serve