To prepare a strawberry pretzel pie, you will first need to prepare your ingredients. You will need the following ingredients: 1 cup granulated sugar 2 tablespoons butter 2 teaspoons vanilla 2 cups rolled oats 1 tablespoon flour 1 teaspoon baking powder 1 tsp. salt 12 cup water To make the filling, mix together the sugar, butter, vanilla, and salt. Pour the mixture into the pie shell and bake in the oven for 20 minutes. Remove the crust and sprinkle the top with confectioners' sugar. Bake for an additional 10 to 15 minutes or until the topping is golden brown. Serve with whipped cream and ice cream.