Apple Walnut Pie

Ingredients (15)

• 3/4 cup ground walnuts
• 2 tablespoons brown sugar
• 2 tablespoons beaten egg
• 1 tablespoon milk
• 3 tablespoons butter, softened
• 1/4 teaspoon vanilla extract
• 1-1/4 teaspoons lemon juice, divided
• Pastry for double-crust pie (9 inches)
• 5 cups sliced peeled tart apples (about 6 medium)
• 3/4 cup sugar
• 2 tablespoons all-purpose flour
• 1 teaspoon ground cinnamon
• 1/4 teaspoon ground nutmeg
• 1/4 teaspoon salt
• Additional milk, optional