Best Rhubarb Pie Recipe - How To Make Rhubarb Pie

Ingredients

• 2 lb. rhubarb cut into 1" pieces (about 7 cups)
• 1 1/2 c. granulated sugar
• 1/4 c. cornstarch
• 1 tbsp. lemon juice
• 1/4 tsp. kosher salt
• 2 batches pie dough
• All-purpose flour, for rolling
• 2 tbsp. butter, cold and cubed
• 1 large egg, lightly beaten with 1/2 tsp. water
• Sanding sugar, for sprinkling