First cut the peeled potatoes into bite-sized cubes and boil them in salted water. (The saucepan should be big enough as all the ingredients will be mixed together later.)
While the potatoes are cooking, the frozen green beans are also cooked al dente in lightly salted water. After cooking, add the beans to the potatoes and keep them warm in the closed pot.
For the bacon béchamel sauce, cut the fat bacon into cubes and leave it in the saucepan at a temperature that is not too high (otherwise it will smoke and splatter when the other ingredients are added). Now add the flour and then the milk to the bacon, stirring constantly, season with salt, pepper and vinegar and bring to the boil briefly. Now add the bacon-bechamel sauce to the potatoes and beans and mix well.
Clint`s potatoes and beans mixed together sour tastes particularly good with meatballs or bratwurst.