Preheat the oven to 350 degrees Fahrenheit.
Add 1 teaspoon garlic powder, 1 teaspoon onion powder, 1 teaspoon ground sage, 1 teaspoon dried rosemary, 1 teaspoon dried thyme, 1 teaspoon dried oregano, 1/4 teaspoon black pepper, 1/8 teaspoon nutmeg, 1 cup silken tofu, 1/3 cup soy sauce, 2 tablespoons olive oil, 2/3 cup cold water, and 1/2 cup nutritional yeast to the blender.
Blend until smooth.
Transfer the blended mixture to a large mixing bowl.
Spoon 2 cups vital wheat gluten into a measuring cup (don’t scoop), then add it to the mixing bowl.
Mix with your hands until combined, then knead for 2-3 minutes (the dough will be quite sticky so I recommend wearing kitchen gloves).
Transfer the dough to a 9x13-inch baking dish (or similar size) lined with parchment paper (to keep it from sticking), then shape it into an oval or loaf.
Cover the baking dish with an oven-safe lid or aluminum foil, then bake for 45 minutes.
Remove the cover, then bake for 10 more minutes.
Brush the roast with extra virgin olive oil before serving, if desired (or skip this step and serve with plant-based gravy instead).