Its Mashed Potato
Ive discovered Molecular Gastronomy and the like, which is basically a term for understanding cooking at a scientific level, although my definition is cooking that f**** with your brain...
You make mashed potato the ordinary way, then divide it up, color/flavour each batch, a bit of gel to make the layers easy to assemble, assemble it as you will, then I hardened the outside of each piece and glazed it a bit to be true to a allsort
Black is squid Ink
White has a bit of titanium dioxide added
The rest I used conventional food coloring, though im thinking a couple of drop of essential oil in the different layers you could have some brilliant flavours...
Some vids
http://www.youtube.com/watch?v=N7i4F6vqOlc#t=2m02s
Hot and Iced Tea (In the same glass), a sorbet that dosent melt when its on fire
http://www.youtube.com/watch?v=ykWNHXfcL20#t=9m50s
Dessert Nachos