Preheat the oven to 350 degrees F.
For the crust: Mold the tart crust into a 9-inch pie pan, cover with tin foil and then cover the foil with uncooked beans. Bake until the crust begins to brown, about 20 minutes. Once the crust is browned, remove from the oven and allow to cool. Remove the beans and foil, then spread the butter on the interior of the crust.
For the filling: Peel, core and slice the apples. Arrange the slices in a ring pattern, starting on the outer edge and going into the center (the apples should be arranged to allow for even cooking).
In a bowl, blend the sugar, melted butter, cinnamon and nutmeg and then pour over the arranged apples.
For the topping: In a separate bowl, blend by hand the flour, sugar and butter. This should be a crumbly looking mixture.
Bake the tart until the apples have softened, 30 to 35 minutes. Remove from the oven and dollop with the sweet butter topping, then return to the oven until the topping has crusted, about 15 minutes. Remove from the oven and allow to rest 10 to 15 minutes before serving.
Recipe courtesy of Robert Irvine