Put thinly sliced apples into a large mixing bowl
In a small bowl mix together the flour, sugar, allspice, cinnamon, and salt.
Sprinkle the melted butter over the apples and mix thoroughly.
Add half of the sugar mixture and toss with the apples, next add the last half and toss until apples are nicely coated.
Fill your crust (recipe for homemade pie crust below) with the apple mixture. **It should be a mound. It may look like too many apples, but during baking, they will cook down.
On a foil lined baking sheet, carefully spoon on the crumble topping ( see recipe for crumble topping in this post)
Pat down the topping with your hands.
Cover with tin foil and bake on the center rack of the oven for 20 minutes. * bake on the foil lined baking sheet to catch any juices that drip off while baking)
Remove tin foil and bake for another 30 minutes.
Server warm.