Preheat oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer). Put tomatoes, red pepper, garlic and carrot in a large casserole dish. Drizzle olive oil over it and sprinkle the spices over it.
Season with sea salt and freshly ground black pepper. Cover the mould with a lid or aluminium foil. Cook the vegetables in a hot oven for 1 hour. Remove the lid or foil and cook the vegetables for another 30 minutes until soft.
Process cooked vegetables in a kitchen blender or with a hand blender to a homogeneous puree.
Put the purée back into the mould or a large heavy saucepan. Add the broth and coconut milk. Stir everything well, warm up at medium temperature and season again with salt and pepper.
Place soup in soup bowls with a ladle, garnish with a few cashew nuts and coconut sambal (see below) and serve.