Core the chilli pepper. Dice the onion and ginger and sauté with the chilli pepper. Peel the tomatoes. Add tomatoes and vegetable stock. Add balsamic vinegar. Let simmer for 10 minutes.
Dice the mango and add half to the soup. Puree everything. Rub some lime zest into the soup. Season to taste with a little lime juice, salt and pepper. Serve the soup with diced mango and crème fraîche.