Italian lemon olive oil cake of your dreams, dressed festively with layers of whipped mascarpone cheese, lemon curd, a honey blueberry sauce and finished with fresh blackberries.
Start by adding the blueberries with the lemon juice, vanilla and honey to a small sauce pan. Bring to a simmer and cook for a couple of minutes, just until the blueberries burst. Remove from flame and adjust sweetness to your taste with more honey. Refrigerate until ready to use.
To make the lemon curd, prepare a double boiler with 2 inches of water in the bottom pan. Bring to gentle simmer.
Add the egg yolks, sugar, lemon zest and lemon juice to the top pan. Whisk together over the steam until combined well. Keep whisking for a few minutes until the curd has thickened and coats the back of a spoon. About 5 to 10 minutes or so. Turn off the flame and whisk in the butter until melted. Transfer the curd to a bowl and cover with plastic wrap. Refrigerate until cooled completely. It should be very thick at this point.
In the bowl of a mixer add the eggs, lemon zest and sugar and using the whisk attachment beat them together until well combined. A few minutes.
Add the egg yolks and sugar to a large mixing bowl. Use a mixer with a whisk attachment to cream the sugars and egg yolks until fluffy and pale in color.
Using a spatula fold the whipped cream (must be stiff) into the whipped mascarpone cheese until combined. Make sure to not over mix. Cover with plastic wrap and refrigerate until ready to use. It should not be runny, it should be thick and creamy.
Once cooled off, remove the cake from the spring form pan by releasing the sides first, then remove the bottom.
Spoon half of the mascarpone filling on top, or as much as you feel comfortable working with. If it seems like too much for you, simply save some for later use. Then top it with half of the blueberries from the blueberry sauce and some of the fresh blackberries. Reserve as much of the liquid from the blueberry sauce as possible for the next layer.
Add the next olive oil cake layer and spoon all the remaining blueberries with the sauce on top. Add the remaining whipped mascarpone (or however much you feel comfortable working with) and with the back of a spoon or spatula rustically spread it over the top. Place the fresh blackberries all over the top, reserving some to decorate the sides of your olive oil cake.