Deliciously Cheesy Chicken Pie with a Flaky Crust

Ingredients:
2 cups cooked chicken, shredded
1 cup shredded cheddar cheese
1 cup frozen mixed vegetables (peas, carrots, corn)
1/2 cup cream of chicken soup
1/2 cup milk
1 teaspoon garlic powder
1 teaspoon onion powder
Salt and pepper to taste
1 pre-made pie crust (or homemade)
1 egg, beaten (for egg wash)