Cook potatoes by steaming or boiling until soft
Peel potatoes while warm and lightly mash
Slice cucumber, salt and massage, then squeeze out water
Boil carrot (50 g) and chop into smaller pieces
Thinly slice onion (½), salt lightly, soak for 5 minutes, then squeeze
Cut ham into small pieces
Boil eggs for 12 minutes
Separate egg yolks and whites, cube the whites, and reserve yolks for topping
Mix wine vinegar (50 ml), olive oil (150 ml), mustard (½ tbsp), salt and pepper to make dressing
Use 4 tbsp of dressing and mix with mashed potatoes
Add vegetables, ham, egg whites, and Kewpie mayo to the potato mixture and mix gently
Chill before serving
Crumble egg yolks on top before serving
