If using active dry yeast, pour the yeast into the warm (between 90-100°F) non-dairy milk with the sugar. Set aside for 10 minutes until foamy.
If using instant yeast, add it directly to the dry ingredients.
In a large bowl, combine the vital wheat gluten, all purpose flour, sugar, and salt. Add the melted vegan butter and the milk/yeast mixture (if using active yeast).
Mix with a large spoon until a shaggy dough forms.
Knead gently with your hands for 1–2 minutes until all the flour is absorbed. Cover with a dish towel and let proof for 1 hour in a warm spot.
After proofing, gently remove the dough from the bowl and place it on a clean surface. Roll it into a log shape with your hands and place in a greased 9 x 5 loaf pan.
Cover and let rise for another 1 hour.
Bake on the lower rack at 350°F (175°C) for 30–35 minutes, until golden brown. If you want your loaf to be more browned on top move to the top rack for 3 to 5 minutes after 35 minutes, to just get it more golden.
Cool in the pan for 10 minutes, then remove and let cool for at least 1 hour before slicing.
Slice with a serrated knife into 16–18 pieces. Store in an airtight container at room temperature or freeze for longer storage.