Thinly slice the potato and onion.
Boil the potato in boiling water.
Blend the boiled potato and milk until smooth in a blender.
Heat olive oil in a pan and sauté the onion.
Cook the pasta noodles.
Add the potato cream to the sautéed onion and bring to a simmer.
Season with salt and pepper.
Add the cooked pasta noodles and mix well.
Serve on a plate and sprinkle with parsley.