Apple Sage Gouda Pie
Not to be confused with tapioca pearls, tapioca flour (sometimes labeled tapioca starch) is powdery like cornstarch. It's a good thickener for pies because it doesn't cloud the filling. Bob's Red Mill is one widely available brand.
**How to Make a Lattice Top
Sister Pie's wide lattice is great for beginners. After making pastry, shape one of the dough portions into a 6x3-inch rectangle (not a disc). Wrap and chill as directed. Roll into a 10x18-inch rectangle. Cut into six 3x10-inch strips. Chill on a parchment-lined baking sheet for 30 minutes. Use 5 or 6 strips to weave a top over the filled pie. Trim ends flush with the rim of the pie plate. Roll up the pastry overhang to seal in the lattice ends and form a thick rim. Crimp to seal.