Mondrian Cake

A little while ago one of my lovely colleagues challenged me to make a Mondrian Cake. The Mondrain Cake is based on the paintings of Piet Mondrian.
My colleague sent me this link with a photo of such a cake. My first thought was: this is fine, the second one: oh dear how do I do this and the third one: oh no, this is not going to work. But a promise is a promise so I set out to make a Mondrian Cake last weekend. On the way there were various challenges: how much sponge do I need, the measurements, the colours, how to assemble. To resolve all of this I basically baked LOTS of sponge in various colours whereby I was not 100% happy with the red ... it was more pink-orange (sigh). But here it is

  The cake measures 6cm x 6 cm. I cut it all using ruler, tooth picks and a very sharp knife and assembled it with chocolate ganache. Unfortunately the ganache was quite soft when I cut the cake, so the chocolate smeared a little bit and the cuts are not quite clean. Oh well, it might be better next time (lol) Petra.