Grate the potatoes in a suitable plate where you'll be assembling the cake. Season with salt. Put on a layer of mayonnaise.
Alternate between a layer of peas, layer of mayo, layer of feta cheese, layer of mayo and so on. Grate cheese and feta cheese on top.
Decorate the sides with finely chopped parsley.
Form snowmen from the mayo mixed with feta cheese (can substitute with cream cheese).
Use black pepper grains to make the eyes and carrot pieces for the noses. Cool in the fridge.