Vegan biryani

Name: Vegan biryani
Ingredients: 240g brown basmati rice; 1½ tbsp rapeseed oil; 1 large onion (220g), finely chopped; 1 cinnamon stick; 1 red chilli, deseeded and finely chopped (optional); 3 large garlic cloves, finely chopped; 20g fresh ginger, peeled and finely chopped; 1½ tsp cumin seeds; 1 large red pepper, deseeded and roughly chopped; 1 large aubergine (320g), cut into cubes; 2 tbsp curry powder; 400g can chopped tomatoes; 2 tsp vegan bouillon powder; 320g small cauliflower florets; 30g coriander, stems and leaves separated and chopped; 40g flame raisins; 50g unsalted cashew nuts, toasted