Begin by greasing two baking sheets and preparing your ingredients. Chop or briefly process 1 cup (115g) of walnut pieces, keeping the pieces relatively large for texture.
In a large mixing bowl, combine 3¼ cups (350g) of barley flour, 2¾ cups (350g) of bread flour, 1 packet of fast-acting dried yeast, and 2 teaspoons of salt. Create a well in the center and add 1 tablespoon of molasses, 2 cups + 2 tablespoons (500ml) of warm milk, and 2 tablespoons of olive oil.
Mix these ingredients together until a slightly sticky dough forms. Transfer the dough to a floured surface and knead for about 10 minutes by hand, or use a dough hook for 5 minutes, until the dough becomes smooth and elastic.
Once the dough reaches the proper consistency, reserve a small handful of the ¾ cup (115g) of sunflower seeds for topping, then knead the remaining sunflower seeds and walnuts into the dough.
Divide the dough into two equal rounds and place each on a prepared baking sheet. Cover each sheet with a large plastic bag and allow the dough to rise in a warm location until it has doubled in size, approximately 30 to 45 minutes.
When the dough has finished rising, preheat your oven to 400°F. In a small bowl, prepare the glaze by mixing 1 tablespoon of beaten egg with 1 tablespoon of clear honey.
Brush this mixture generously over the surface of each loaf and sprinkle with the reserved sunflower seeds.
Bake according to the recipe's instructions until the loaves are golden brown and sound hollow when tapped on the bottom.