AT LEAST 4 HOURS PRIOR: Soak 1 cup cashews
Make the lemon mayo: In a blender pitcher, combine:
Blend on high, adding more water and scraping the sides as necessary. Keep going until you have a creamy/smooth mayo-like consistency. Scrape the mayo into a container, cover, and place in the fridge until needed.
Boil 800g small new potato in well-salted water for 20m until just cooked, drain, then cool.
Cut the potatoes into chunks, then throw into a bowl with 3 shallots, finely chopped. Add enough lemon mayo to bind and ¼ tsp white pepper.
Mix together 3 tbsp extra-virgin olive oil and 1 tbsp white wine vinegar. Add just enough to give a little sharpness to the salad.
Stir in a small handful chives, roughly chopped, and serve.
Modified from The First Mess and BBC Good Food