Preheat oven to 375'F. Stir apples, raspberries, sugar, flour, lemon and salt together in a large bowl. Set aside.
On a lightly floured surface roll out one disc to 12" around and 1/8" thick. Fit into a 9" pie plate. Fill with the apple mixture. Dot with butter.
Repeat the above step with the second disc of dough. Drape over the filling. Trimp overhang to 1". Press edges to seal. Flute as you wish. Make 3 one inch slits in the top of the crust. Refigerate for 20 minutes.
After 20 minutes, whisk the egg yolk and cream in a bowl and brush the pie all over with this mixture. Sprinkle with sugar. Bake until golden brown and the juices are bubbline. Bake 1 hr. 10 minutes to 1 hour 20 minutes.
Note: You can put this on a cooie sheet to catch any drips. Also tent the pie with foil if it's getting too brown on the top, I usually do this.
When done remove the pie from the oven and set on a wire rack to cool for 4 hrs. or overnight. It's best to wait otherwise the juices will run all over.