Dutch Apple Pie with Graham Cracker Crust Is So Simple, Yet So Delicious!

Name: Dutch Apple Pie with Graham Cracker Crust Is So Simple, Yet So Delicious!
Cuisine: American
Ingredients: 5½ - 6 cups apples, sliced thin, I used a combination of Gala, Green Granny Smith and Golden Delicious apples; 1 Tbsp lemon juice; ½ cup granulated sugar; ¼ cup lightly packed light brown sugar; 3 Tbsp all-purpose flour; ½ tsp sea or kosher salt; 1 tsp ground cinnamon; ½ tsp apple pie spice or nutmeg; ½ tsp vanilla extract; 1 prepared graham cracker crust, regular or large1; 1 egg, mixed with 1 tsp cold water; ¾ cup all-purpose flour; ¼ cup granulated sugar; ¼ cup brown sugar; ⅓ cup unsalted cold butter, cut into small pieces; ¼ tsp sea or kosher salt