Cook the tortellini in boiling salted water for 16-18 minutes. Drain. Peel and finely dice onions. Steam in hot oil. Mustard with sweat on. Deglaze with 1/8 l water and vinegar, bring to the boil. Stir in broth. Seasoning
Rinse the beans and let them drain. Wash and quarter the tomatoes. Clean and wash spring onions and arugula. Cut both into small pieces
Mix tortellini, beans, spring onions, rocket salad, tomatoes and marinade. Leave to stand for about 2 hours. Garnish with sliced Parmesan