Slice potatoes 1/4 inch thick, bring water to a boil before adding potatoes. Cook for exactly 10 minutes. Do the same for the green beans.  Important not to overcook them as they will fall apart.  

In a separate bowl, mix together all of the ingredients for the dressing.

Cut bacon into 1 inch strips and fry till done, not too crispy.

After cooking potatoes, green beans and bacon, add them together in a large mixing bowl and pour the dressing over it evenly. Let marinade for at least an hour before serving, stirring frequently.