Combine the vital wheat gluten to chili pepper flakes in a bowl and stir so everything is distributed evenly.
In another bowl, whisk together the wet ingredients, water to cinnamon (okay, that one's not wet, whatever).
Pour the wet into the dry and stir, then knead to combine until strands of gluten form and you have a dough. If it's too dry add a tiny bit more water.
Cut into four pieces.
Knead each piece a bit and form into a sausage shape.
Cut four pieces of aluminum foil.
Place each piece of seitan sausage in the center of a piece of foil longways. Bring both ends of foil up to meet in the middle and fold it over itself until it touches the sausage. It should be so that it can open itself up as needed when it expands while steaming later.
Fill a sauce pan about 1/3 with water and place a steamer basket in it or, if you don't have a steamer basket (like me), just use a metal strainer on top.
Put the tin-foil wrapped sausages in the steamer and cover. I usually do two on bottom with the other two criss-crossed on top.
Steam on medium heat for 40 minutes. After 20 minutes flip the bottom and top sausages so they get evenly steamed.
Remove from heat and let cool, then unwrap and store in a Tupperware container.
Should be fine for a week or two in the fridge or you could cut them in pieces and freeze them for later!