To prepare a South African pumpkin soup with banana and curry recipe, you will first need to gather your ingredients. Peel and slice your pumpkin. Cut the pumpkin in half lengthwise and scoop out the seeds. Place the cut pumpkin flesh side down on the bottom of the soup pot. Add the chopped bananas and stir to combine. Cover the pot and cook on medium heat until the banana is soft, about 15 minutes. Remove the pan from the heat and add the coconut milk. Simmer the mixture for 5 to 10 minutes or until it thickens. Serve with sour cream.