French Fare: Mussels Marinière Quiche

Ingredients

• 1 shallot
• 2 3/4 pounds Spanish mussels
• 3 1/2 tablespoons white wine
• 2 cups whole milk
• 2 cups heavy cream
• 2 eggs
• 2 egg yolks
• 1 bunch flat-leaf parsley
• Fine salt and black pepper
• 2 cups all-purpose flour
• 1/2 cup unsalted butter
• 1 teaspoon fine salt
• 3 1/2 tablespoons water
• 1 egg yolk