In your blender or food processor, add all the vegan turkey ingredients EXCEPT for the vital wheat gluten. Blend until smooth.
In a large bowl, add the vital wheat gluten and contents from your blender, mix together. Once the mixture comes together, knead for ~3 minutes. Form a log shape.
Wrap your vegan turkey in parchment paper and then tin foil, securing the ends. Wrap tight enough so that it's well secure, but your vegan turkey will expand a bit when it's being steamed, so don't wrap too tight (photo above).
Use a double steamer (or a metal colander and pot duo) to steam your vegan turkey. Fill the bottom pot half full of water and bring to a boil. Place your vegan turkey in the above colander pot and place the lid on top. Make sure that the water does not touch your vegan turkey.
Reduce to a simmer and let steam for 1 hour 20 minutes. Check on your water level every 20 minutes or so to ensure it hasn't all evaporated. Top up the water as necessary - the best way to do so is by boiling water in a kettle and adding it to your pot.
Once it's finished steaming, remove the foil and parchment paper from your vegan turkey and either move on to the base and bake step or let cool and store for later.
Storage: Once steamed, you can store your vegan turkey in the fridge for up to 1 week before basting and baking if you'd like to make it ahead of time, or freeze for longer storage.