Preheat the oven to 400°F. Wash and scrub the potatoes then dry them completely.
Rub the potatoes with olive oil and sprinkle with some salt. Place the potatoes on a baking sheet and bake in the oven for about 50 minutes to one hour until they're completely cooked.
Let the potatoes cool to room temperature.
Meanwhile, chop the green onions and set them aside.
Cook the bacon strips in a pan over medium heat. There is no need to use oil to cook the bacon. Once cooked, chop the bacon into small pieces.
Peel the cooled potatoes and discard the skin. Chop the potatoes into small chunks and place them in a large bowl with green onions, bacon and cheddar cheese. Stir to combine.
Mix the mayonnaise, sour cream, salt, pepper and white vinegar in a bowl to combine.
Add the dressing to the salad and mix well to combine. Cover and let it chill in the fridge for at least 30 minutes before serving.