Mix the dry ingredients in a large bowl. Mix the wet ingredients in a stand mixer until smooth. Then add these to the bowl and knead everything vigorously for at least(!) 5 minutes.
Preheat the oven to 180 degrees Celsius. Shape the seitan mixture into a cylinder. Roll it up in a large piece of aluminium foil and close the ends tightly by twisting them.
Now cook the seitan roast for about 1 hour. Remove from the oven and leave to cool completely, preferably overnight.
Remove the seitan roast from the foil and prick it a few times with a fork. Leave to stand in the hot but no longer boiling stock for about 30 minutes. Remove and leave to cool slightly.
In the meantime, preheat the oven again to 180 degrees Celsius and mix the glaze. Brush the roast with about 2/3 of the glaze and bake for 20 minutes. Brush with the remaining glaze and bake for another 5 minutes.