Nostalgic Potesara
ポテトサラダ·(potesara)
Japanese Breakfasts & Bento Boxes
If you spent time eating out of convenience store bento boxes in Tokyo or grew up in a Japanese household, you know the singular comfort of potesara. It is fundamentally different from the American picnic staple—partially mashed, deeply creamy, and relying on a few non-negotiable thermodynamic tricks instead of fussy ingredients. By flash-drying the potatoes, seasoning them hot with rice vinegar, and letting them cool entirely before folding in the Kewpie mayo and violently squeezed salted vegetables, you capture the undeniable, enduring taste of a Japanese grandmother’s kitchen on a Tuesday night.
Before you start
Boil the eggs ahead of time.
Having your eggs boiled, cooled, and peeled before you start cooking keeps this a true 15-minute weeknight process.
Ingredients
- Russet potatoes1 1/2 lb
- carrot1 med
- Persian cucumbers2 med
- yellow onion1/4 small
- deli ham3 oz
- eggs2 large
- rice vinegar1 1/2 tbsp
- granulated sugar1/2 tsp
- Kewpie mayonnaise1/2 cup
- kosher salt1 tsp
- black pepper1/4 tsp
Method
- 01
Salt the vegetables to draw out excess moisture.
Toss the thinly sliced cucumbers and onions with a half teaspoon of kosher salt in a small bowl and let them sit. This osmotic trick draws out the cellular water so your salad stays creamy, not watery, in the fridge tomorrow.
- 02
Boil the potatoes and carrots until tender.
Place the potato chunks and carrot slices into a large pot, cover with an inch of cold water, and add a heavy pinch of salt. Bring to a boil, then reduce to a simmer for 12 to 15 minutes until a fork slides easily into the largest potato chunk.
- 03
Flash-dry the potatoes over the heat to create a powdery texture.
Drain the vegetables in a colander, then immediately dump them back into the hot, empty pot over medium heat. Shake the pot vigorously for about 60 seconds until the edges of the potatoes break down and look powdery, ensuring they will act like dry sponges for the seasoning.
- 04
Mash and season the potatoes while they are piping hot.
Off the heat, roughly mash the hot potatoes, leaving some satisfying bite-sized chunks. Immediately fold in the rice vinegar, sugar, and black pepper; the intense heat mellows the harsh acidic bite of the vinegar into a gentle, sweet tang.
- 05
Cool the mixture completely before adding the mayonnaise.
Let the potato mixture sit until it has cooled entirely to room temperature. Adding mayonnaise to hot potatoes breaks the emulsion, separating it into a greasy puddle of oil.
- 06
Squeeze the vegetables dry and fold the salad together.
Grab handfuls of the salted cucumbers and onions and violently squeeze them over the sink to drain the liquid. Fold the aggressively squeezed vegetables, chopped ham, eggs, and Kewpie mayonnaise into the cooled potatoes until it forms a cohesive, creamy masterpiece.
Notes
The Kewpie workaround.
If you absolutely cannot find Kewpie mayonnaise in the Asian aisle of your supermarket, use standard mayonnaise mixed with an extra teaspoon of rice vinegar and a pinch of sugar to approximate the tangy, sweet profile.
From Cook Japanese in America.