Steamed fish fillets in a creamy leek sauce

Name: Steamed fish fillets in a creamy leek sauce
Prep time: 15 min
Total time: 15 min
Yield: 4 porties
Cuisine: Belgian
Ingredients: hot water; potatoes; olive oil; firm white fish fillets; salt; ground black pepper; eschalots; unsalted butter; leeks; white wine