Pour the beans into a sieve, rinse with cold water and drain well. Grate cheese finely. Wash and halve the tomatoes. Peel onions and garlic. Chop onions finely, chop garlic very finely.
Wash parsley, shake dry, pluck leaves and chop finely.
Heat 3 tablespoons of oil in a saucepan. Sauté onions and garlic in it until transparent. Add tomatoes, sprinkle with 1 1⁄2 tbsp. brown sugar and braise briefly. Season with salt and pepper. Stir in tomato paste and sauté briefly.
Deglaze with vinegar and 1⁄4 l water, stir in broth and beans. Bring to the boil and simmer for about 5 minutes.
In the meantime heat 3 tablespoons of olive oil in a large frying pan. Fry the bread in it, possibly in portions on both sides until golden brown.
Season the ragout again with salt, pepper and vinegar. Spread the bread on four plates and add the ragout. Sprinkle with parsley and cheese.