Mix whole wheat flour, dry yeast, salt, and sugar together.
Add lukewarm water and olive oil and knead the dough.
Place the dough in a bowl, cover with plastic wrap, and let it rise for 1 hour (first fermentation).
Punch down the dough and shape it.
Put the dough in a bread pan and let it rise for a second proof for 40 minutes.
Bake in a preheated oven at 180°C for 35 minutes.