Put the beans into boiling salted water. Cover and cook for about 5 minutes, drain. In the meantime mix horseradish and cream cheese, season with pepper. Spread on the roast beef slices.
Wash the chives, cut them into stalks about 5 cm long, spread them on the slices, roll them up and pin them with wooden skewers. Clean and wash the peppers, peel the vegetable onion, cut both into fine strips.
Heat 1 tablespoon of oil. Fry the peppers and beans for 1-2 minutes. Season with salt and pepper. Stir in onions. Mix vinegar and sugar. Add vinegar and another 3 tablespoons of oil to the vegetables. Serve lukewarm.
Serve with the rolls. Baguette bread tastes good with them.