BFCP Menu — Les Petites Gourmettes

Ingredients

• 1 sheet puff pastry from a 17.3-ounce package
• 4 ounces soft, milk goat cheese, such as Montrachet
• 3 ounces grated fresh mozzarella cheese
• 1/4 cup sour cream
• 3 tablespoons grated Parmesan cheese
• Salt and freshly ground black pepper
• 1 large egg
• 1 tablespoon water
• 2 tablespoons unsalted butter
• 2 large onions, peeled and sliced
• Pinch of sugar
• 2 tablespoons balsamic vinegar