Mix whole wheat flour, water, salt, yeast, and olive oil together.
Knead the dough for 15 minutes to form gluten.
Place the dough in a bowl, cover with plastic wrap, and let rise for 1-2 hours (first fermentation).
Shape the risen dough and put it into a loaf pan.
Let the dough rise in the loaf pan for another 40-60 minutes (second fermentation).
Bake in a preheated oven at 180°C (356°F) for 35-40 minutes.
Let cool on a wire rack before serving.