Cut the tempeh into small cubes or crumble it with your hands. Add the tempeh, vegetable broth, and soy sauce to a medium pot. Bring the broth to a slow simmer, cover the cooking pot, and simmer the tempeh for 20 minutes.
Prep the dry ingredients while the tempeh simmers. Add the vital wheat gluten (seitan), thyme, marjoram, rosemary, sage, nutmeg, smoked paprika, black pepper, and red chili flakes to a medium bowl.
Once the tempeh is done, drain it over a colander. Use the back of a spoon to press excess moisture from the tempeh.
Add the tempeh, onion, garlic, mushrooms, maple syrup, soy sauce, and vegan Worcestershire sauce to a food processor or blender. Blend until the tempeh and other ingredients are broken down. You don't want a smooth paste.
Add the tempeh mixture to the dry ingredients. Mix with a spoon until the ingredients are moist and blended.
Use your hand to form a ball of sausage mixture. If the ball crumbles, the sausage mixture is too dry. Add a little water. If the ball melts into your hand, it is too moist. Add a little vital wheat gluten (seitan).
Separate the sausage mixture into small balls and form about ¼ an inch thick. If you are going to pan-fry them, keep them on the thin side so they thoroughly cook in the middle. The number of sausage patties depends on how big you make them. I ended up with 9.