Prepare pie crust according to the pie crust recipe.
Take one portion of crust. Spread some flour on the counter and roll out.
Place in the pie plate.
Remove the extra crust around the edges.
Pinching with your fingers, create an attractive scalloped pattern around the edges.
Refrigerate the crust while you prepare the appless.
Squeeze the juice of one lemon into a large mixing bowl.
Peel the apples at once to reduce browning.
Cut the apples in thin slices.
Toss the apples in the lemon juice gradually as you cut the slices, to prevent browning. Mix the flour and the sugar together separately; toss into the apples until coated.
Place the apples flat in the cold pie crust. Bake for 15 minutes at 450F, then reduce the temperature to 350F and continue baking for a further 40 minutes.
Serve at room temperature.