Fry the bacon in the meat frying fat. Add onions, garlic, pepperoni and olives and fry until onions are translucent. Possibly add 2 tablespoons of olive oil. Then deglaze everything with the potato water, sprinkle with herbs, stir and simmer for about 1 minute. Then add the still warm potatoes and beans, mix everything together well and season with a pinch of sugar, vinegar and ground pepper. Be very careful with salt as the potatoes and beans are already salted.