Apple and Maple Turnovers

Ингредиенты

• 1 egg
• 1 tablespoon (15 ml) water
• 2 cups (500 ml) Empire apples (or McIntosh), peeled and grated
• 1 teaspoon (5 ml) lemon juice
• 1/3 cup (75 ml) maple butter
• 1 piece 7 oz (200 g) puff pastry, thawed
• Sugar (optional)