Duchess potatoes with sole with samphire and beurre blanc

Ingredients

• Agristo Duchess potatoes
• 200 ml white wine
• 100 ml white wine vinegar
• 200 ml water
• 1 shallot
• 3 cloves garlic
• black pepper
• pair of sprigs of thyme
• 3 bay leaves
• 4 fillets of sole 250 grams
• 200 grams peeled shrimps
• 200 ml glasswort
• 0.5 cream
• lemon
• salt and pepper
• pair of lumps of butter