The coarse salt on which you place the sweet potatoes and potatoes cooks them gently and preserves moisture. 45 minutes at 180°C, then you scoop out the flesh to mix with cream, mustard and chives before putting them back in the oven.

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Ingredients for 4 servings

servings
  1. 2 sweet potatoes
  2. 4 Charlotte potatoes
  3. 0.4 cup (10 cl) heavy cream
  4. 1 tbsp mustard
  5. Chives, chopped
  6. Coarse salt