Stir in the spinach while warm, then remove pan from heat. Let filling cool and drain any excess juices.
Assemble Pies
Roll dough onto floured surface to 1/8" thickness. Cut into 5 inch circles (use a bowl or mini tart tray for shape).
Spoon filling onto one half of each circle and sprinkle with cheese. Leave 1/4 inch space of crust around the edge of the circle. Paint a little egg wash on edge of dough to help when closing. Fold over the other half and press ends together with fingers.
1 1/2 cup gouda or gruyere cheese
Lay each pocket onto a lined baking sheet. Slit two small lines in center with knife. Using a small pastry brush, apply egg wash onto top and sides of pie. Sprinkle pies with chia or sesame seeds.
1 large egg, 1 teaspoon water
Bake at 425℉ (220℃) on middle rack of the oven for 20 minutes or until golden brown. Let cool for 10-12 minutes before serving.
Notes
Storage: These pies are best eaten within a day of baking for best flavor and freshness. However, they can be stored in airtight container at room temperature for up to 3 days.
Freezer: You can also wrap them with plastic wrap and place in a freezer storage bag for up to 2 months. Thaw frozen pies to room temperature and then microwave to warm before serving.