Peel the potatoes and cut into quarters, boil them until soft, drain and set aside.

In a separate pan fry the bacon until Golden brown.

Over medium heat melt the butter, then add the flour and constantly stir for a minute (approx.) Milk in small portions to pour into the roasted flour, stirring constantly to avoid lumps. Season with salt and pepper and proverjaem until light thick. At the end add grated cheese, stir well until obtaining a homogeneous sauce.

Mix sauce with potatoes and bacon, sprinkle with green onions. Bon appetit!