Stir together the flour, Splenda Stevia and salt in a large bowl.
Sprinkle in the vegan butter pieces and toss to coat.
Using your hands, rub the butter into the dry ingredients with your fingertips until the butter is incorporated and the mixture is chunky but not homogenous.
Using a large spoon, carefully sprinkle streusel mixture onto the top of the pie. Using the spoon, press the mixture onto the sides of the pie, using your hands to press in if needed.
Place the pie on a parchment paper lined baking sheet and bake for 40-45 minutes, until the filling is soft and bubbly and the topping has browned. You can very carefully brown the top of the pie for a minute or two on the Broil setting, but be very careful your pie doesn’t burn!
Let pie cool to room temperature. Serve with your favourite sugar free ice cream or 0% greek yogurt, or enjoy on its own!