Pre-heat oven to 170 C / 340 F.
Grease and flour bundt tin. Make sure you get into all the creases and don't forget the middle 'chimney'.
Zest and juice lemons (I use a microplane grater for zesting but you can also use a vegetable peeler and then mill in Thermomix for 3 seconds / speed 10).
Add almonds to the Thermomix bowl. Mill for 10 seconds / speed 9. Set aside.
Add sugar and eggs to the bowl. Mix for 20 seconds / speed 5.
Add ricotta, olive oil, lemon zest and juice and vanilla extract. Mix for 20 seconds / speed 5.
Add flour and almonds to the bowl. Mix for 30 seconds / speed 5.
Pour cake batter into the prepared bundt tin. Bake in the oven for 35 - 40 minutes, or until a skewer inserted into the cake comes away clean.
Allow the cake to cool in the tin before turning out onto a serving plate.
Dust with icing sugar if preferred.