Japanese potato salad

A nice side dish for summer is a Japanese potato salad .
You will need
two small potatoes
about 6 rounds of thinly cut cucumber then cut into quarters
about a tablespoon of finely diced red onion
1 teaspoon of brown rice vinegar +1/2 teaspoon for the Mayo
salt
unrefined granulated sugar 1/2 teaspoon for the potatoes and 1/2 teaspoon for the Mayo
2 tablespoons of vegan mayonnaise
1/4 teaspoon of Dijon mustard
a tablespoon of fresh lemon juice
salt and pepper to taste
First boil or steam two small peeled potatoes until tender and mash with a fork when done . Add to the potatoes brown rice vinegar and sugar mix and add salt and pepper to taste.
combine quartered cucumber and onion with salt and mix leave for ten mins then rinse.
Add to the potato the onion and cucumber .
Now to make a kewpie style mayonnaise
kewpie Mayo is pretty famous in Japan it has a picture of a baby on the front . However it contains egg , so we are going to make one of our own.
mix 1/4 teaspoon of Dijon mustard with the mayonnaise then mix in 1/2 teaspoon of sugar and 1/2 teaspoon of brown rice vinegar lemon juice and salt to taste .
Mix the mayonnaise with the potato and serve with watercress on the side .