01 -
In a food processor, combine flour, sea salt, sugar, butter, and ice water. Process until coarse crumbs form. Transfer to a work surface, shape into a ball, then divide into two discs. Wrap in plastic and chill for at least 1 hour or overnight.
02 -
Preheat your oven to 425°F (220°C).
03 -
In a bowl, whisk together the flour, onion powder, garlic powder, sea salt, and black pepper. Add milk and whisk until smooth.
04 -
In a saucepan over medium heat, boil 2 cups of water. Dissolve the chicken base in the boiling water, then whisk in the milk and flour mixture. Cook, stirring constantly, until thickened, about 3 minutes. Set aside.
05 -
In a large nonstick saucepan, add potatoes, 2 tablespoons butter, garlic, and ½ cup water. Cover and cook for 10 minutes until the potatoes are soft, stirring occasionally.
06 -
Add remaining butter, carrots, celery, and onion to the saucepan. Cook until softened, then stir in peas, corn, turkey, and sauce. Remove from heat.
07 -
Roll out the chilled dough discs. Fit one into the bottom of a pie dish. Add the turkey mixture, then top with the second dough disc. Seal the edges and cut an 'X' for steam to escape.
08 -
Whisk together egg yolk and heavy cream. Brush over the pie crust. Use a pie crust shield to protect the outer edge if desired.
09 -
Bake on the lower oven rack for 30-35 minutes until the crust is golden and the filling is bubbling. Cool for at least 10 minutes before serving.