Preheat oven to 350°F (180°C). Peel and finely julienne the carrots. If whole, grind hazelnuts and oatmeal.
Pour the batter in 3 6’’ cake pans and bake 20 minutes or until a wood skewer or knife, comes out clean. You can also use one single medium size cake mold. In that case, bake 5-10 minutes more.
Let the cakes chill completely. Meanwhile, prepare a super strong chamomile tea: 2 bags in a ½ cup of simmering water, 2, maximum 3, minutes infusion.
Beat the egg white until firm and peaky. Add the sugar and a few tablespoons of the chamomile tea, and mix well.
When cakes get to room temperature, pile them, adding a layer (about 2.5 tablespoons) of the chamomile cream in between. Refrigerate 5 minutes.
Add a top and a side layer, and refrigerate 5 minutes more.
Finally, pour all the remaining cream over the cake, let it pour down the sides, and adjust with a spatula. For a really, really, solid finish keep on adding thin layers and refrigerating (larger intervals, about 15-20 minutes) until you get the desired thickness.
Your cake is ready. Decorate it with colorful wildflowers!
If you refrigerate the cake overnight, the cream will turn into a firm frost. Just remember to take it out of the fridge at least an hour before serving it.