I loved it. It was a melted chocolate bomb with just a hint of almond taste. Both me and my husband loved it. It reminded us of chocolate lava cake or chocolate souffle. Due to lack of deep freezer, we missed a little vanilla ice cream. Maybe next time. :)))
The dough was easy to make. Just mixed the flour, the cocoa powder, the sugar and the salt together. Added the butter, the water and the egg yolk at the same time and made the crust with my hand. Very easy, took me only 15 minutes.
The filing was again 15 minutes to make. I could not find biscotti, but I did find amaretti. I used 10 small amaretti and cut them into four. I made two 4-inch tartlets and one 7-inch tartlet. The latter is on the pictures, because I forgot to brush the tartlet forms with melted butter, so the small ones were stuck. We ate them out with a spoon. Not really picture-friendly. :))))
In terms of baking, 10 minutes were enough for the small ones, but the big one needed almost 20 minutes. Still no complaints.
Absolutely agree with the storing hint. They are indeed the best the day they've made. I refrigerated and ate one the next day. It lost it melted chocolate texture. It was a simple hard chocolate cake. So don't wait, eat it right away.