Cut potatoes into quarters.
Place potatoes in a large pot and cover with water.
Bring to a boil over medium-high heat, reduce to a simmer and cook until fork tender, about 15 minutes.
Strain the water from the potatoes and rinse with cold water. Allow to cool.
Cook bacon in a frying pan until crispy. Chop into pieces.
Place the potatoes in a large mixing bowl, add mayo, caesar dressing, sour cream and mustard.
Mix until the potatoes are completely coated in dressing.
Add green onion, bacon and cheddar cheese.
Mix well and serve.