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Weigh your flours; or measure them by gently spooning into a cup, then sweeping off any excess. Combine all the dough ingredients, and mix and knead — by hand, mixer, or bread machine set to the dough cycle — until a smooth, elastic dough forms, adding more water or flour as needed.
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Cover the dough and allow it to rise for 60 to 90 minutes, or until it's just about doubled in bulk.
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Transfer the dough to a lightly greased work surface and shape it into a 12" log. Place the log into the lightly greased and semolina-dusted base of an Italian baker or a long covered baker. Cover with the lid, and let the loaf rise until very puffy, about 1 hour.
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About 20 minutes before the end of the rising time, preheat the oven to 425°F.
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Remove the cover and slash the loaf diagonally three times. Cover the loaf with the lid again and immediately put it into the oven.
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Bake the bread, covered, for 25 to 30 minutes.
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While the bread is baking, prepare the topping. In a small saucepan or microwave-safe bowl heat the butter and honey until the butter has melted. Stir to combine.
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Remove the bread from the oven and remove the cover of the baker. Brush the loaf with the butter-honey mixture and sprinkle heavily with the sesame seeds.
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Return the loaf to the oven, uncovered, and bake for 5 to 10 minutes longer, until it's a deep golden brown; a digital thermometer inserted into the center should read 190°F.
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Transfer the bread in the baker to a rack. Allow the bread to cool for 10 minutes, then turn it out onto a rack to cool completely.
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Store the cooled bread, well wrapped, at room temperature for several days. Freeze for longer storage.