Ingredients for 4 servings

servings
  • 500 g (17.75 oz) new potatoes from Ré or Noirmoutier, just wiped dry
  • 1 handful of coarse sea salt or 5 liters (5.25 qt) of seawater
  • 50 g (1.75 oz) organic dried seaweed or 100 g (3.5 oz) fresh seaweed
  • 100 g (3.5 oz) good half-salted butter (churned or other)
  • Fleur de sel