Mix all-purpose flour and whole wheat flour in a bowl. Add yeast and salt, then mix roughly with a spatula.

Make a well in the center and pour 1 cup and 1/2 cup lukewarm water. Mix roughly with a spatula until no dry flour remains.

Cover the bowl with plastic wrap and let it rise at room temperature for 2 hours until doubled in size.

Deflate the dough by mixing lightly with a spatula. Shape it into a round loaf, dusting with flour as needed.

Place the shaped dough on a baking tray, dust with whole wheat flour using a sieve, cover with plastic wrap, and let it rise for 1 hour.

Score the dough with a knife in a cross or diagonal pattern. Bake in a preheated oven at 230°C (450°F) for 30 minutes until golden brown.