Burnt aubergine veggie chilli

Name: Burnt aubergine veggie chilli
Ingredients: 1 aubergine; 1 tbsp olive oil or rapeseed oil; 1 red onion, diced; 2 carrots, finely diced; 70g puy lentils or green lentils, rinsed; 30g red lentils, rinsed; 400g can kidney beans; 3 tbsp dark soy sauce; 400g can chopped tomatoes; 20g dark chocolate, finely chopped; ¼ tsp chilli powder; 2 tsp dried oregano; 2 tsp ground cumin; 2 tsp sweet smoked paprika; 1 tsp coriander; 1 tsp cinnamon; 800ml vegetable stock; ½ lime, juiced; brown rice; tortilla chips, mashed avocado, yogurt or soured cream, grated cheddar, roughly chopped coriander (optional)