1. Add the lukewarm water to a large bowl, add the fresh yeast and mix until the yeast dissolves.
2. Add the vinegar, the two flours, salt and the seeds to the bowl and mix for several minutes until the dough comes off the sides of the bowl. The dough will be still sticky, but that is ok.
3. Brush a loaf tin (about 9×5 inches) with the oil and sprinkle with the seeds (keep some to add them on top of the dough). Add the dough to the tin and sprinkle with the remaining seeds. Place in the cold oven and heat up to 390°F (200°C) – bake for about 60-65 minutes. Take the finished bread out of the oven and remove from the tin. Let cool down completely on a wire rack.