Jerk sweet potato & black bean curry

Name: Jerk sweet potato & black bean curry
Prep time: 50 min
Cook time: 45 min
Total time: 1 h 35 min
Cuisine: Caribbean
Ingredients: 2 onions 1 diced, 1 roughly chopped; 2 tbsp sunflower oil; 50g ginger roughly chopped; small bunch coriander leaves and stalks separated; 3 tbsp jerk seasoning; 2 thyme sprigs; 400g can chopped tomato; 4 tbsp red wine vinegar; 3 tbsp demerara sugar; 2 vegetable stock cubes, crumbled; 1kg sweet potato peeled and cut into chunks; 2 x 400g cans black beans rinsed and drained; 450g jar roasted red pepper cut into thick slices