Pear Crumble Pie

Ingredients

• 1 (8-inch) unbaked pastry crust
• 2 cups fresh pears (4 to 5)
• Lemon juice
• 1/2 cup granulated sugar
• 2 tablespoons all-purpose flour
• 1/8 teaspoon salt
• 1 egg beaten
• 1 cup sour cream
• 1/2 teaspoon vanilla extract
• Sprinkle of nutmeg
• 1/3 cup granulated sugar
• 2/3 cup all-purpose flour
• 1/4 teaspoon cinnamon
• 1/4 teaspoon nutmeg
• 4 tablespoons butter