In a medium sized saucepan, place the red potatoes and cover with water. Boil over medium high heat until a fork can pierce the potatoes easily. (about 15 minutes)
Drain the potatoes and set them aside.
In the same saucepan, place 4 slices of bacon and allow to fry until crispy.
When crispy, remove the bacon and set aside.
Add the butter to the bacon drippings and heat over medium heat till melted. Add the chopped onions and cook till translucent.
Cut the bacon into pieces and add back to the saucepan.
Drain the cans of green beans and pour into the saucepan.
Add the potatoes back to the saucepan. Add water to come about halfway up the level of the green beans in the saucepan (about a cup of water) (read step 9 before you add the water).
Add 1 Tbs sugar and Add 1 heaping teaspoon of chicken broth concentrate (if you do not have broth concentrate, then add chicken broth instead of water in step number 8). Add the vinegar and cayenne.
Stir well and when beans start to steam and boil, they are done. Taste and add salt and pepper to taste.