Fresh Pear Pie

INGREDIENTS

• 1 recipe pastry for a 9 inch double crust pie
• 1/2 cup white sugar
• 3 tablespoons all-purpose flour
• 1/4 teaspoon salt
• 1 teaspoon ground cinnamon
• 1 teaspoon lemon zest
• 5 cups peeled and sliced pears
• 1 tablespoon butter
• 1 tablespoon lemon juice