Preheat oven to 350 degrees F.

Line a 9 inch springform pan with aluminum foil or parchment (you can also use a disposable aluminum pan).

Grease the parchment and the sides of the pan with margarine or oil, and dust with matzah meal.

Grind the pistachios (or almonds), then add the sugar, almond extract and salt in a food processor. Add the egg and blend.

Remove from the food processor and knead with your hands until the mix holds together (it will still be very crumbly), adding a spoonful or two more egg white if necessary.

Press the dough onto the bottom of the pan with your fingers or knuckles.

Bake the crust for 10 minutes.

Take it out of the oven and press it down quickly again with a ball of paper towel or the back of a spoon (it will be too hot to touch), trying to make it slightly concave .

Put it back in the oven and bake for another 3-4 minutes Take out again, press down again, and allow it to cool down and harden.

Remove the parchment or aluminum lining, put the crust back into the pan.

Melt the chocolate chips in a bain-marie (or in your microwave) without letting it boil or burn, and add the oil or margarine; stir until smooth, pour the mixture on top of the crust, and refrigerate for at least 2 hrs. The crust and filling can be made several days in advance and stored in the refrigerator.

A few hours before serving brush the chocolate top with a little preserve and arrange the fresh berries on top.

Leave out of the fridge for at least one hour before serving to make it easier to cut, and use a sharp knife.

*** Tip: this type of crust can be hard to cut, so don’t serve the cake in a delicate platter unless you pre-slice it!