Vegetable dhansak

Name: Vegetable dhansak
Prep time: 30 min
Cook time: 1 h
Total time: 1 h 30 min
Cuisine: Indian
Ingredients: 1 small cauliflower, cut into small florets; 500g/1lb 2oz sweet potatoes, cut into cubes; 1 tbsp vegetable oil; 1 large onion, thinly sliced; 2 carrots, peeled and cut into cubes; 3 garlic cloves, grated; 20g/¾oz fresh root ginger, peeled and grated; 1 tsp ground turmeric; 1 heaped tbsp garam masala; 200g/7oz dried split red lentils, rinsed and drained; 400g tin chopped tomatoes; 600ml/21fl oz reduced salt vegetable stock (gluten-free if necessary); 150g/5½oz frozen green beans or peas; salt and freshly ground black pepper; 300g/10½oz cooked basmati rice; natural yoghurt (optional); flatbreads (optional); handful fresh coriander, chopped