Step 2: Attach the crust
I folded down the edge of the back and stitched the crust to the filling. When the crust was all attached, I sewed a couple stitches at one side of the back crust where it sticks up above the pie, pushed it through the crust a little bit, pulling tight, and sewed another couple stitches. I did that along the back to make the crust slightly puckered. You can see me pulling the thread tight in the second to last picture to gather the crust a bit and make it wavy/puckered to resemble real pie crust.