Clean and wash the leek and cut into thin rings. Rinse and drain the beans. Wash and dice the tomatoes. Peel and finely dice onion and garlic
Cook the ribbon noodles in plenty of boiling salted water for about 6 minutes until al dente
Steam onion, garlic and leek in hot oil for about 5 minutes, season. Add the tomatoes, steam for another 5 minutes. Add 3/8 l water. Bring to the boil, stir in broth. Add beans, simmer briefly. Season to taste with salt, pepper and sambal
Wash the parsley and chop finely, except for a little bit. Drain the pasta and serve with the sauce. Sprinkle with parsley and garnish. Grated cheese, e.g. Parmesan cheese, goes well with the pasta