One Good Pie

Pie Dough:  What I would do is just buy a pie crust, to not go through the hassle of making a shell.                             

1 1/4 cups flour                                                
1tsp baking powder
4 oz/115g unsalted butter, cut into small pieces
1/4 sugar
1egg yolk
1-2 tsp cold water

Filling:
 

2/3 cup heavy cream
2/3 cup milk
8oz/225g semisweet chocolate chopped
2 eggs

Crumble Topping:
 

1/2 cup packed brown sugar
3/4 cup toasted pecans
4oz/115g semisweet chocolate
3oz/85g amaretti cookies
1tsp unsweetened cocoa

Directions:

• To make the pie dough, sift the flour and baking powder into a large bowl, rub in the butter, and stir in the sugar, then add the egg and a little water to bring the dough together. Turn the dough out, and knead briefly. Wrap the dough and let chill in the refrigerator for 30 minutes.
• Preheat the oven to 375 degrees F/190 degrees C. Roll out dough and use to line a 9-inch/23cm loose-bottom tart pan. Prick the pastry shell with a fork. Line with parchment paper and fill with dried beans. Bake in the oven for 15 minutes, remove from oven and take out the paper and beans. Reduce the oven temperature to 350 degrees F.
  
• Bring the heavy cream and milk to a boil in a pan, remove from the heat, and add chocolate. Stir until melted an smooth. Beat eggs and add to the chocolate mixture, mix thoroughly and pour into the shell. Bake for 15 minutes, remove from the oven, and let rest for an hour.
• When you are ready to serve the pie, place the topping ingredients in a food processor and pulse to chop. (If you don't have a food processor, place the sugar in a large bowl, chop the nuts and chocolate with a large knife, and crush the cookies, then add to the bowl with the cocoa and mix well.) Sprinkle over the pie and then serve it in slices. 

I also added whipped cream by whipping 1 cup of heavy cream and 2 tbs of sugar and then put the crumble topping over that.