Lattice-Topped Rhubarb Pie

Ingredients

• 1 3/4 cup all-purpose flour
• 3 tbsp sugar
• 1/8 tsp salt
• 1/4 cup cold unsalted butter, cut into small pieces
• 3 tbsp vegetable shortening
• 5 tbsp ice water
• Cooking spray
• 6 cups (1-inch-thick) slices rhubarb (about 1 1/2 pounds)
• 1 cup sugar
• 3 tbsp cornstarch
• 1 1/2 tsp grated orange rind
• 1/4 tsp ground nutmeg
• 1 1/2 tsp 1% low-fat milk
• 1 tbsp sugar