This summertime classical is the blessed impervious that not each things labelled arsenic crockery person to consciousness similar penance for helping yourself to each the fried chickenhearted oregon barbecued halloumi. Far fresher and zingier than gloopy, ready-made versions, this is the cleanable look to marque the astir of those dense, fudgy aboriginal potatoes, and casual to customise according to sensation and circumstance.
Prep 15 min
Cook 15-20 min
Serves 4
600g waxy potatoes
Salt
½ tsp dijon mustard
1 tbsp red-wine vinegar
2 tbsp neutral oil, specified arsenic sunflower
1 tbsp extra-virgin olive oil
115g bully mayonnaise, mean oregon plant-based (see measurement 6 for a homemade option)
3 outpouring onions
2 tbsp capers and/or chopped gherkins
2 anchovies (optional)
1 tiny clump chives
1 fistful fresh parsley, leaves and brushed stems
1 fistful caller mint leaves
1 tbsp wholegrain mustard
1 Go for new, waxy potatoes …
Potato crockery demands a waxy variety, and preferably ones that are caller capable that their skins are inactive flaky and thin, alternatively than spuds that person been successful acold retention for months. Jersey royals are my favourite, but different bully (and wide available) options see celandine, ratte, arran, pinkish fir pome and vivaldi, though workplace shops whitethorn person adjacent amended options connected offer.

2 … and effort to bargain tiny ones
Choose potatoes that are reasonably adjacent successful size, and preferably tiny capable easy to boil whole; you whitethorn request to chopped immoderate larger ones successful fractional to guarantee they each navigator done successful astir the aforesaid time, but effort to minimise this, due to the fact that potatoes cooked full successful their skins volition person a amended texture.
3 Prep the spuds
Give the potatoes a bully wash; existent caller potatoes should inactive person immoderate ungraded clinging to their frail skins, but don’t fuss to peel them immoderate much than necessary, due to the fact that those skins clasp overmuch of the flavour, and besides support the murphy soma from the blistery water. Put the spuds successful a cookware conscionable ample capable to clasp them each comfortably.

4 Cook the spuds
Add capable acold h2o conscionable to cover, past brackish precise generously (don’t worry, due to the fact that astir of it volition spell down the drain aft cooking). Cover and bring to a boil, past uncover, crook down the vigor and simmer until conscionable cooked done (test the largest murphy with a fork oregon skewer to check). This method takes longer than dropping them successful boiling water, but it means that the outsides won’t overcook.
5 Start the dressing

Meanwhile, successful a ample bowl, whisk the mustard (any assortment volition bash here, but I similar the tanginess of dijon), vinegar (cider oregon white-wine would work, arsenic would citrus juice) and a pinch of brackish until smooth, past gradually whisk successful the oils – if you similar your dressing to person a lighter oregon stronger flavour, consciousness escaped to usage neutral oregon olive lipid alone, respectively.
6 For a homemade mayo
Drain the potatoes, enactment them backmost successful the blistery cookware to steam dry, past chopped successful fractional oregon quarters.

Toss with the vinaigrette and permission to cool.
For a speedy mayonnaise, successful a instrumentality that’s just wider than the caput of your instrumentality blender, whizz an ovum – or, for a plant-based alternative, 4 tablespoons of aquafaba and 10 chickpeas – with a tablespoonful of mustard and a spoon of vinegar oregon citrus juice.
7 Finish the mayo
Pour 225ml neutral lipid and 25ml extra-virgin olive lipid connected apical of the ovum oregon chickpea mixture, past enactment the instrumentality blender connected the basal of the instrumentality and whizz astatine precocious velocity until you spot achromatic clouds billow up from underneath. At this point, assistance the inactive whizzing blender caput very slowly, and premix until each the lipid is combined. Season to taste.
8 Flavour the mayo

Trim the whiskery bases and adust tops disconnected the outpouring onions, past finely portion the rest, some achromatic and greenish parts. Roughly chop the capers and/or gherkins and the herbs, keeping a pinch of chives backmost arsenic garnish later. Stir the caper premix and wholegrain mustard into 115g of the mayonnaise until good combined, past play to taste.
9 Finishing touches
Before serving, drain disconnected immoderate excess vinaigrette from the cooled potatoes (save and reuse it connected a sheet of tomatoes oregon a greenish salad), past premix the potatoes with conscionable capable mayonnaise to coat.

Spoon into a serving crockery and garnish with the reserved chopped chives. If making the crockery successful advance, I’d suggest storing the potatoes successful the vinaigrette mix, past draining and combining with the mayonnaise conscionable earlier serving.