Lamb and tomato curry

Ingredients

• 1 tablespoon vegetable oil
• 1 small onion, chopped
• 500 gram lamb mince
• 1/4 cup mild indian curry paste
• 2 tablespoon tomato paste
• 1 cup beef stock
• 400 gram can chickpeas, drained, rinsed
• 2 tomatoes, chopped
• natural yoghurt, coriander leaves, roti (see tip) to serve