In a large bowl, crumble the fresh yeast and pour in the cold water. Let it sit for a couple of minutes until the yeast has dissolved.
When the yeast has dissolved, add the honey, oil, and the grated fruit or veggie. If you use nuts or dried fruits, chop them into smaller pieces and add them to the dough. Mix well.
Add 2 dl of the all purpose flour as well as the salt and give it a careful stir, as not to squash the feta pieces. From here, you’re going to add more all purpose flour a little bit at a time, until you’ve reached the right consistency. You’ll want it to be firm and hard to mix, kind of like a very thick oatmeal.
Cover the bowl tightly with plastic wrap and let it rise overnight.