Place an oven rack in the center of the oven and preheat to 350 degrees F.
Liberally butter the tart pan.
For the crust:
Combine the all-purpose flour, almond flour, almonds, cocoa powder and
sugar in a food processor. Process until the almonds are finely ground. Add the
butter and pulse until the mixture forms a coarse meal. With the processor
running, gradually add 2 tablespoons of iced water until the mixture forms a
ball, adding extra water, as needed, if the mixture is too dry. Form the dough
into a disc and wrap in plastic. Refrigerate for 20 minutes.
Roll out the dough into a 10-inch circle on a lightly floured work surface.
Place the dough in the tart pan and trim any excess dough from the top of the
pan. If the dough cracks, press scraps of dough into the cracks to seal. Prick
the dough all over, using a fork, and bake for 15 minutes. Let the crust cool
for 15 minutes.
For the filling:
Place the chocolate and butter in a small bowl over a saucepan of barely
simmering water. Stir occasionally until the chocolate has melted and the
mixture is smooth. Beat the eggs, liqueur, sugar and vanilla in a medium bowl.
Pour the melted chocolate into the egg mixture and whisk until smooth. Pour the
filling into the prepared crust. Place the tart pan on a baking sheet and bake
until the filing has set and begins to crack slightly on top, 22 to 25 minutes.
Allow the tart to cool completely, about 1 hour.
For the apricot cream:
Beat the cream at high speed until stiff peaks form, using a hand mixer.
Add the jam and vanilla. Beat until the jam is incorporated into the cream.
Remove the tart from the pan and cut into thin wedges. Serve with a dollop of
apricot cream.