Grease and/or line a bundt pan (see note 3).
Preheat the oven to 175℃ (350℉).
Cream together the butter and sugar until light and fluffy (I used my stand mixer with a paddle attachment).
Cut a lemon in half, and retain one half for the frosting.
With the other half, roughly slice it and place in a food processor. Work until you are left with small pieces (similar to minced garlic).
Add the lemon to the butter/sugar mixture along with the cottage cheese, eggs and vanilla. Whisk until well combined. Don't be alarmed that the curds of the cottage cheese don't mix in very well. Although it looks a bit weird, it's perfectly fine.
Mix the remaining dry cake ingredients together and add to the wet. Work just until combined (don't over mix).
The batter is very thick, so dollop it into the prepared pan, using a knife to level it off a little.
Bake on a lower shelf for around 45 minutes. Start checking at 35 minutes. At this point, you will probably need to cover it with a little foil or baking paper so that it doesn't burn.
The cake is ready when an inserted skewer comes out clean. Remove the cake from the oven. The cake is very fragile when hot, so leave it for at least 30 minutes before removing it from the tin.