I have never made this before. I looked up a number of different recipes and then made up my own. I used my old standby of a buttermilk crust. I doubled the crust recipe . I sauteed 7 sliced Gala apples till tender and added cinnamon and sugar and flour and a pinch of salt. I rolled out the crust and piled on the apples and baked till golden and juicy. I was wonderful with vanilla Blue Bell ice cream. We have it here in the South I don't think everyone can get it ...it is still sold in real half gallons.
Single Crust recipe:
1 c AP flour and cut in 5 TB chilled unsalted butter and 1/4 tsp kosher salt till large crumbs. I use my Cusinart. Place in freezer till ready to use. Remove from freezer and toss with chilled buttermilk till holds together. Roll out on floured counter w/ floured pin. Brush crust with beaten egg white and pile on apples leaving a 2 inch border. Turn up and pleat edges of crust. Brush w/ remaining egg white and sprinkle with Turbinado sugar. Bake at 375 till brown and juicy...about 40 minutes. I used a piece of parchment paper on a cookie sheet and it worked great .