Dhal with cumin-roasted cauliflower - Good Food Middle East

Ingredients

• 200g red lentils
• 1 cauliflower , broken into florets, large leaves roughly chopped
• 2 tbsp vegetable oil
• 2 tsp turmeric
• 2 tsp black mustard seeds
• 2 tsp cumin seeds
• 1 onion , finely chopped
• 2 garlic cloves , grated
• 25g ginger , most finely chopped, some cut into matchsticks
• 1 tsp Kashmiri chilli
• 1 tsp ground coriander
• 1 tsp tomato purée
• 1 x 400g can of chopped tomatoes
• small bunch of coriander , roughly chopped (save a small handful of whole leaves to serve)
• 4 tbsp natural yogurt , to serve (optional)