Clean the beans and spring onions. Cut the spring onions into rings. Peel the vegetable onion and cut into cubes. Peel and chop the garlic. Core the chilli pepper and cut into fine rings.
Heat the oil. Add the garlic, chilli and vegetables and sauté. Deglaze with coconut milk and simmer for about 15 minutes. Season to taste.
Pluck 10 large mint leaves, cut into strips and stir in 2 minutes before the end of the cooking time (if you use dried mint, you can add this along with the other spices).
Oven-fresh flatbread or basmati rice goes well with it.