Peel and dice the potatoes into small pieces.
Slice the onion thinly.
Heat olive oil in a pot and sauté the onions.
Add the potatoes and continue to sauté together.
Pour in water or vegetable broth and boil until the potatoes are cooked through.
Once the potatoes are very soft, blend until smooth.
Season with salt and pepper to taste.
Serve in a bowl and finish with olive oil or herbs.