Using the whisk attachment on a stand mixer, mix together the yeast, sugar, melted butter, egg and milk.
Then change the whisk for a dough hook and add the salt, the 3 flours and sesame seeds.
Blend together slowing for a minute before beating together on a medium setting until a ball of dough is formed.
Place in a lightly oiled bowl, cover with cling film and put in a warm place until doubled in size (about 1 hr).
Lightly grease a baking sheet.
Knead the dough several times and make a nice neat dome hiding any creases underneath. Put a few decorative slashes on the top.
Place on baking sheet, cover with cling film and put in a warm place for about an hour until doubled in size.
Pre-heat oven to 170°C
Brush the loaf with the egg wash and bake until lightly browned about 37 – 40 minutes. (Test by knocking loaf on back and if hollow noise it’s ready).
Cool loaf on a wire rack.