The beans, wash and clean, don`t break them. Dice the onions and fry them in hot butter until translucent. Put the beans on top. Pour 1/8 l of water, season with salt, a little pepper and sugar and cover the beans for about 15 minutes. Pour the bean liquid into a small saucepan, keep the beans warm. Mix sweet and sour cream as well as paprika with flour and add to the simmering bean liquid. Let simmer again for about 3 minutes. Season the sauce with salt, pepper and hot paprika. Heat the pepper strips in the sauce and pour everything over the beans. Fried potatoes and meatballs go well with it.