Grandma Bertha's Rhubarb Pie | Culinary Butterfly

Ingredients

• 2 1/2 cups all-purpose organic flour (plus extra for dusting)
• 1 teaspoon salt
• 1 cup organic vegetable shortening (I use Spectrum brand)
• 1 large organic egg, beaten
• 1 tablespoon white vinegar
• 1/2 cup cold water
• 7-8 stalks rhubarb,chopped
• 2/3 cup granulated sugar
• 1 teaspoon all-purpose flour
• 4 tablespoons cold butter (cut into 1/2-inch pieces)