In a medium-low heat skillet, cook diced onion until translucent.
Add garlic to this and cook for another 2-3 minutes, stirring regularly to avoid burning.
In a high speed blender, blend onion, garlic, soy milk and silken tofu until smooth and creamy.
In a medium-low heat pan, begin cooking mushrooms. Add the tofu gravy mixture into the pan with the mushrooms.
Add the seasoning to the gravy and stir until well-combined.
Add in vegan sausage patties. Cook and stir, chopping up sausage with a spatula as you cook it. Cook for 10 - 15 minutes until sausage is completely cooked; gravy should be pretty thick. If you'd like it thinner, add more soy milk.
Add gravy to the biscuits.