In a large bowl, add the strawberries and orange zest. In a small bowl, add the orange juice and cornstarch and whisk. Pour over the strawberries and stir. Add the brown sugar and stir to coat.
Roll out your pie crust and place in a pie pan, pinching the edges to seal. Pour in the strawberry mixture.
To make the topping, add the flour, butter pieces, oats, brown sugar and cinnamon to a medium bowl. Use your fingers to pinch together the butter and flour until it resembles cornmeal in texture. Then pour the topping over the strawberries. Sprinkle with the granulated sugar.
Place pie on a baking sheet. Bake for 50 minutes or until the top is browned and bubbly.
Recipe by Tastemaker Blog at https://tastemakerblog.com/2019/05/21/strawberry-crumble-pie/