The ingredients
• 5 medium sized Jerusalem artichokes
• 1 small potato
• 6 medium shrimp / prawns
• 20 cl / 6 ¾ fl oz whipping / single cream
• 20 g / 4 tsp Bordier Roscoff onion butter
• Chives
• 5 cl / ¼ cup olive oil
• 2 shallots
• Pepper and Fleur de Sel