Start by waking up the yeast. Pour the warm water into a large bowl, stir in the honey, then sprinkle the yeast over the surface. Leave it alone for about 5 to 10 minutes, until it looks foamy and active.
Once the yeast is ready, add the egg, vegetable oil, and dry milk powder. Stir everything together until the mixture is smooth and evenly combined.
Next, begin adding the salt, 7-grain cereal, whole wheat flour, and bread flour a little at a time. Keep mixing until the dough comes together and feels soft but not sticky.
Turn the dough out onto a lightly floured surface and knead it for about 8 to 10 minutes. You’re looking for dough that’s smooth, stretchy, and elastic.
Place the kneaded dough into a lightly greased bowl, cover it with a towel, and let it rest in a warm spot for about an hour, or until it has doubled in size.
After the first rise, gently punch the dough down to release the air. Shape it into a loaf and place it in a greased loaf pan. Let it rise again for about 30 minutes.
Bake in a preheated oven at 350°F (175°C) for around 35 minutes, until the top is golden brown. Remove from the oven and let it cool before slicing.