Place the bread flour, fine semolina, instant yeast, salt, honey, yogurt, lukewarm water, and olive oil into the bowl of a stand mixer.
Mix with the dough hook on medium-low speed for 5-6 minutes, until everything comes together into a sticky dough.
Sprinkle your worktop with a little flour and tip the dough onto it. Knead by hand for a few more minutes, until the dough feels soft, smooth, and easier to handle. Try not to add too much extra flour.
Place the dough in a lightly oiled bowl, cover, and leave it to rise in a warm place for about an hour, or until doubled in size.
Lightly grease a 2 lb loaf tin / 9 x 5 inch loaf pan / about 23 x 13 cm with olive oil, or line it with parchment paper.
Tip the risen dough onto a lightly floured worktop and gently press it into a rough rectangle, keeping the width close to the length of your loaf tin.
Starting from one of the shorter sides, roll the dough up tightly into a log. Try to keep the roll even as you go, and gently pinch the seam closed at the end.
Turn the dough seam-side down and gently roll it back and forth with your hands to form a smooth log.
Tuck the ends under slightly, then place the dough into the prepared loaf tin with the seam side down.
Cover loosely and leave it to rise for 35 to 45 minutes, or until puffy and risen well in the tin.
Preheat the oven to 375°F / 190°C / 170°C fan / Gas Mark 5.
Brush the top of the dough lightly with beaten egg white. Sprinkle over the sesame seeds and press them in gently with your fingers. Brush the top very lightly with olive oil.
Bake for 35 to 40 minutes, or until golden and hollow-sounding when tapped underneath.
Leave the bread in the tin for 10 minutes, then transfer it to a wire rack. Let it cool for at least 45 minutes before slicing.