First prepare your chard. Wash well, then cut out the stalks and slice them up like your would celery. Reserve the leaves for now.
Heat the oil in a deep frying pan and add the chard stalks. Season and fry for 5 minutes. Add the rinsed beans, chopped tomatoes and garlic. Fry for another 5 minutes until the tomatoes are melting into a kind of sauce.
Roll up the chard leaves and slice into strips. Add to the pan and cook for another 4 minutes and they will wilt down into the pan. Season generously and serve. Served with smoked sausage in the picture.