Prepare the Chēbē dough according to package directions.
Preheat the oven to 375°F. Lightly oil 4 (large) ramekins with coconut oil.
In a medium saucepan, combine the olive oil and onion. Cook over medium heat until the onion is soft, about 5-10 minutes. Add the potatoes, garlic, and chicken. Cook until fragrant, 1-2 minutes.
Add the milk, salt, and pepper. Stir in the food starch a little at a time until blended. Stir and cook until the mixture thickens, about 10-15 minutes. Once thickened, set aside.
Divide the Chēbē dough into 4 equal portions. Lightly flour a work surface with the food starch or GF flour. Take one of the dough portions and pinch off a ⅓ of the dough for the top of the pot pie. Pat or roll the remaining dough portion into a circle that is about ⅛” thick. Transfer the circle into one of the ramekins and shape the dough so that it forms a nice crust.
Repeat with the remaining dough portions. Divide the chicken filling amongst the 4 ramekins.
Pat or roll each piece of dough that you saved for the tops into circles that will just cover the ramekins. Pinch the dough tops onto each of the pot pie crusts, sealing off the pot pies. Crimp the edges with your fingers or a fork.
Cut a small X in the center of each pot pie to allow steam to vent out. Brush the egg wash over the pot pies. Sprinkle with garlic salt if desired.
Place the ramekins on a baking sheet. Bake for 20-30 minutes, the tops should be golden brown.
Remove from the oven and let cool for 5-10 minutes before popping the pot pies out of the ramekins. Enjoy!