Creamy Mushroom and Mussel Tart | Saveur

Ingredients

• 1 1⁄2 cups flour, plus more
• 9 tbsp. unsalted butter
• 1⁄4 tsp. kosher salt
• 5 tbsp. ice-cold water
• 2 cups dry white wine
• 3 dozen mussels, scrubbed
• 4 tbsp. unsalted butter
• 3 cloves garlic, minced
• 1 small yellow onion, minced
• 2 tsp. minced thyme
• 1 tsp. dried savory
• 1⁄2 tsp. fennel seeds
• 10 white button mushrooms, roughly chopped
• 1⁄3 cup flour
• 1⁄2 cup heavy cream
• 1⁄2 cup milk
• 2 1⁄2 cups grated Gruyère
• 2 tbsp. minced parsley, plus leaves for garnish
• 1⁄4 tsp. freshly grated nutmeg
• Zest and juice of 1 lemon
• Kosher salt and freshly ground black pepper, to taste