Mix whole wheat flour, protein powder, yeast, and salt in a bowl.
Add lukewarm water and olive oil, then knead into a dough.
Let the dough rise for the first proof (40 minutes).
Punch down the dough, place it in a bread tin, and let it rise for the second proof (20 minutes).
Bake in a preheated oven at 170°C for 30 minutes.